diff --git a/pod/ai_enhancement/forms.py b/pod/ai_enhancement/forms.py
index bb18df55f7..f0bc053370 100644
--- a/pod/ai_enhancement/forms.py
+++ b/pod/ai_enhancement/forms.py
@@ -69,11 +69,8 @@ class Meta:
                 "aria-describedby": "id_titleHelp",
             },
         ),
-        help_text=_(
-            """
-            Please choose a title between 1 and 250 characters.
-        """
-        ),
+        help_text=_("Please choose a title between 1 and %(max)s characters.")
+        % {"max": 250},
     )
 
     description = forms.CharField(
diff --git a/pod/completion/static/js/caption_maker.js b/pod/completion/static/js/caption_maker.js
index c4e32b65c7..a6adda20e4 100644
--- a/pod/completion/static/js/caption_maker.js
+++ b/pod/completion/static/js/caption_maker.js
@@ -961,11 +961,11 @@ function createCaptionBlock(newCaption, spawnFunction) {
       this.div.append(this.numberCharactersDiv);
       this.div.append(this.buttonsDiv);
 
+      const nbCharsMsg = gettext("%s/%s characters");
       // Update numberCharactersDiv content
       const updateCharacterCount = () => {
         let nbCharacters = this.captionTextInput.value.length;
-        this.numberCharactersDiv.textContent =
-          nbCharacters + gettext("/80 characters");
+        this.numberCharactersDiv.textContent = interpolate(nbCharsMsg, [nbCharacters, 80]);
         if (nbCharacters > 80) {
           this.numberCharactersDiv.append(this.numberCharactersAlert);
         }
diff --git a/pod/locale/fr/LC_MESSAGES/django.mo b/pod/locale/fr/LC_MESSAGES/django.mo
index e17f63bc1b..f38f308794 100644
Binary files a/pod/locale/fr/LC_MESSAGES/django.mo and b/pod/locale/fr/LC_MESSAGES/django.mo differ
diff --git a/pod/locale/fr/LC_MESSAGES/django.po b/pod/locale/fr/LC_MESSAGES/django.po
index e09a598279..884fcd543d 100644
--- a/pod/locale/fr/LC_MESSAGES/django.po
+++ b/pod/locale/fr/LC_MESSAGES/django.po
@@ -5,7 +5,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Pod\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-11-27 12:02+0100\n"
+"POT-Creation-Date: 2024-12-11 15:32+0000\n"
 "PO-Revision-Date: \n"
 "Last-Translator: obado <bado@unice.fr>\n"
 "Language-Team: Pod Team cotech-esup-pod@esup-portail.org\n"
@@ -101,15 +101,11 @@ msgstr "La discipline proposée par l’IA Aristote."
 msgid "Title"
 msgstr "Titre"
 
-#: pod/ai_enhancement/forms.py
-msgid ""
-"\n"
-"            Please choose a title between 1 and 250 characters.\n"
-"        "
-msgstr ""
-"\n"
-"            Veuillez entrer un titre contenant entre 1 et 250 caractères.\n"
-"        "
+#: pod/ai_enhancement/forms.py pod/playlist/forms.py pod/quiz/forms.py
+#: pod/quiz/models.py
+#, python-format
+msgid "Please choose a title between 1 and %(max)s characters."
+msgstr "Veuillez entrer un titre contenant entre 1 et %(max)s caractères."
 
 #: pod/ai_enhancement/forms.py pod/live/models.py pod/main/forms.py
 #: pod/main/models.py pod/playlist/forms.py pod/playlist/models.py
@@ -4795,7 +4791,7 @@ msgstr "Dernières vidéos"
 msgid "Most views"
 msgstr "Les plus vues"
 
-#: pod/main/models.py
+#: pod/main/models.py pod/video/models.py
 msgid "Order"
 msgstr "Ordre"
 
@@ -6514,7 +6510,7 @@ msgstr ""
 "        <p>Vous avez besoin de ce mot de passe pour entrer : "
 "<strong>%(password)s</strong></p>\n"
 "        <p>Cordialement</p>\n"
-"    "
+" "
 
 #: pod/meeting/views.py
 #, python-format
@@ -6597,23 +6593,25 @@ msgstr "Vous ne pouvez pas redémarrer ce webinaire en direct."
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Webinar mode has been successfully started for “%s” meeting."
-msgstr "Le mode webinaire a bien été démarré pour la réunion « %s »."
+msgid "Webinar mode has been successfully started for “%(name)s” meeting."
+msgstr "Le mode webinaire a bien été démarré pour la réunion « %(name)s »."
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Error to start webinar mode for “%s” meeting: %s"
-msgstr "Erreur de démarrage du mode webinaire pour la réunion « %s » : %s"
+msgid "Error to start webinar mode for “%(name)s” meeting: %(exc)s"
+msgstr ""
+"Erreur de démarrage du mode webinaire pour la réunion « %(name)s » : %(exc)s"
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Webinar mode has been successfully stopped for “%s” meeting."
-msgstr "Le mode webinaire a bien été arrêté pour la réunion « %s »."
+msgid "Webinar mode has been successfully stopped for “%(name)s” meeting."
+msgstr "Le mode webinaire a bien été arrêté pour la réunion « %(name)s »."
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Error to stop webinar mode for “%s” meeting: %s"
-msgstr "Erreur dans l’arrêt du mode webinaire pour la réunion « %s » : %s"
+msgid "Error to stop webinar mode for “%(name)s” meeting: %(exc)s"
+msgstr ""
+"Erreur de démarrage du mode webinaire pour la réunion « %(name)s » : %(exc)s"
 
 #: pod/meeting/webinar.py
 msgid ""
@@ -6630,38 +6628,41 @@ msgstr "Trop de webinaires"
 #: pod/meeting/webinar_utils.py
 #, python-format
 msgid ""
-"There are too many webinars (%s) for the number of live gateways allocated "
-"(%s). The next meeting has been created but not like a webinar:%s %s [%s-"
-"%s].\n"
+"There are too many webinars (%(nb_webinars)s) for the number of live "
+"gateways allocated (%(nb_live_gateways)s). The next meeting has been created "
+"but not like a webinar: %(id)s %(name)s [%(start_at)s-%(end_at)s].\n"
 "Please fix the problem either by increasing the number of live gateways or "
 "by modifying/deleting one of the affected webinars (with the users’ "
 "agreement).\n"
-"Other webinars: %s"
+"Other webinars: %(names_webinars)s"
 msgstr ""
-"Il y a trop de webinaires (%s) pour le nombre de passerelles de live "
-"allouées (%s). La prochaine réunion a été créée mais pas comme un webinaire :"
-"%s %s [%s-%s].\n"
+"Il y a trop de webinaires (%(nb_webinars)s) pour le nombre de passerelles de "
+"live allouées (%(nb_live_gateways)s). La prochaine réunion a été créée mais "
+"pas comme un webinaire : %(id)s %(name)s [%(start_at)s-%(end_at)s].\n"
 "Veuillez résoudre le problème en augmentant le nombre de passerelles de live "
 "ou en modifiant/supprimant l’un des webinaires concernés (avec l’accord des "
 "utilisateurs).\n"
-"Autres webinaires : %s"
+"Autres webinaires : %(names_webinars)s"
 
 #: pod/meeting/webinar_utils.py
 #, python-format
 msgid ""
-"<p>There are too many webinars (<b>%s</b>) for the number of live gateways "
-"allocated (<b>%s</b>). The next webinar has been created but <b>not like a "
-"webinar</b>:<ul><li><b>%s %s</b> [%s-%s].</li></ul><p>Please fix the problem "
-"either by increasing the number of live gateways or by modifying/deleting "
-"one of the affected webinars (with the users’ agreement).<br>Other webinars: "
-"<b>%s</b>"
+"<p>There are too many webinars (<strong>%(nb_webinars)s</strong>) for the "
+"number of live gateways allocated (<strong>%(nb_live_gateways)s</strong>). "
+"The next webinar has been created but <strong>not like a webinar</strong>:"
+"<ul><li><strong>%(id)s %(name)s</strong> [%(start_at)s-%(end_at)s].</li></"
+"ul><p>Please fix the problem either by increasing the number of live "
+"gateways or by modifying/deleting one of the affected webinars (with the "
+"users’ agreement).<br>Other webinars: <strong>%(names_webinars)s</strong>"
 msgstr ""
-"<p>Il y a trop de webinaires (<b>%s</b>) pour le nombre de passerelles live "
-"allouées (<b>%s</b>). La prochaine réunion a été créée mais <b>pas comme un "
-"webinaire</b> : <ul><li><b>%s %s</b> [%s-%s].</li></ul><p>Veuillez résoudre "
-"le problème en augmentant le nombre de passerelles live ou en modifiant/"
-"supprimant l’un des webinaires concernés (avec l’accord des utilisateurs)."
-"<br>Autres webinaires : <b>%s</b>"
+"<p>Il y a trop de webinaires (<strong>%(nb_webinars)s</strong>) pour le "
+"nombre de passerelles live allouées (<strong>%(nb_live_gateways)s</strong>). "
+"La prochaine réunion a été créée mais <strong>pas comme un webinaire</"
+"strong> : <ul><li><strong>%(id)s %(name)s</strong> [%(start_at)s-%(end_at)s]."
+"</li></ul><p>Veuillez résoudre le problème en augmentant le nombre de "
+"passerelles live ou en modifiant/supprimant l’un des webinaires concernés "
+"(avec l’accord des utilisateurs).<br>Autres webinaires : "
+"<strong>%(names_webinars)s</strong>"
 
 #: pod/playlist/apps.py pod/playlist/models.py
 #: pod/playlist/templates/playlist/add_or_edit.html
@@ -6685,10 +6686,6 @@ msgstr "Informations générales"
 msgid "Security informations"
 msgstr "Informations de sécurité"
 
-#: pod/playlist/forms.py pod/quiz/forms.py pod/quiz/models.py
-msgid "Please choose a title between 1 and 250 characters."
-msgstr "Veuillez entrer un titre contenant entre 1 et 250 caractères."
-
 #: pod/playlist/forms.py pod/playlist/models.py
 msgid "Please choose a description. This description is empty by default."
 msgstr "Veuillez choisir une description. Celle-ci est vide par défaut."
@@ -6738,12 +6735,10 @@ msgstr "Lecture automatique"
 msgid "Please choose if this playlist is an autoplay playlist or not."
 msgstr "Veuillez choisir si cette playlist est en lecture automatique ou non."
 
-#: pod/playlist/forms.py
-#, python-brace-format
-msgid "You cannot create a playlist named \"{FAVORITE_PLAYLIST_NAME}\""
-msgstr ""
-"Vous ne pouvez pas créer une liste de lecture nommée "
-"\"{FAVORITE_PLAYLIST_NAME}\""
+#: pod/playlist/forms.py pod/playlist/tests/test_forms.py
+#, python-format
+msgid "You cannot create a playlist named “%(name)s”"
+msgstr "Vous ne pouvez pas créer une liste de lecture nommée « %(name)s »"
 
 #: pod/playlist/forms.py
 msgid "Remove playlist cannot be undone"
@@ -6774,15 +6769,6 @@ msgstr "Protégé par un mot de passe"
 msgid "Private"
 msgstr "Privé"
 
-#: pod/playlist/models.py
-#, python-brace-format
-msgid ""
-"Please choose a title between 1 and {__MAX_LENGTH_FOR_PLAYLIST_NAME__} "
-"characters."
-msgstr ""
-"Veuillez entrer un titre contenant entre 1 et "
-"{__MAX_LENGTH_FOR_PLAYLIST_NAME__} caractères."
-
 #: pod/playlist/models.py
 msgid ""
 "Selecting this setting causes your playlist to be promoted on the page "
@@ -7163,6 +7149,7 @@ msgid "contact its owner"
 msgstr "contacter son propriétaire"
 
 #: pod/playlist/templatetags/favorites_playlist.py
+#: pod/playlist/tests/test_forms.py
 msgid "Favorites"
 msgstr "Favoris"
 
@@ -7170,10 +7157,6 @@ msgstr "Favoris"
 msgid "This field is required."
 msgstr "Ce champ est requis."
 
-#: pod/playlist/tests/test_forms.py
-msgid "You cannot create a playlist named \"Favorites\""
-msgstr "Vous ne pouvez créer une liste de lecture nommé \"Favoris\""
-
 #: pod/playlist/tests/test_views.py pod/playlist/views.py
 #, python-format
 msgid "Playlist: %(name)s"
@@ -7187,6 +7170,10 @@ msgstr "Vous ne pouvez pas accéder à cette liste de lecture."
 msgid "The playlist has been deleted."
 msgstr "La liste de lecture a été supprimée."
 
+#: pod/playlist/views.py
+msgid "Delete the playlist"
+msgstr "Supprimer la liste de lecture"
+
 #: pod/playlist/views.py
 #, python-format
 msgid "Edit the playlist “%(pname)s”"
@@ -7202,9 +7189,9 @@ msgstr ""
 "Les données envoyées pour créer la liste de lecture ne sont pas valides."
 
 #: pod/playlist/views.py
-#, python-brace-format
-msgid "Edit playlist “{playlist.name}”"
-msgstr "Éditer la liste de lecture « {playlist.name} »"
+#, python-format
+msgid "Edit playlist “%(name)s”"
+msgstr "Modifier la liste de lecture « %(name)s »"
 
 #: pod/playlist/views.py
 msgid "JSON in wrong format"
@@ -7587,7 +7574,7 @@ msgstr "Veuillez choisir si les réponses correctes seront affichées ou non."
 msgid "Quizzes"
 msgstr "Quiz"
 
-#: pod/quiz/models.py
+#: pod/quiz/models.py pod/quiz/tests/test_models.py
 msgid "Quiz of video"
 msgstr "Quiz de la vidéo"
 
@@ -10454,8 +10441,10 @@ msgstr "Veuillez entrer un titre."
 
 #: pod/video/utils.py
 #, python-format
-msgid "Please enter a %s from 2 to %s characters."
-msgstr "Veuillez entrer un %s contenant entre 2 et %s caractères."
+msgid "Please enter a %(field_name)s from 2 to %(max_length)s characters."
+msgstr ""
+"Veuillez entrer un %(field_name)s contenant entre 2 et %(max_length)s "
+"caractères."
 
 #: pod/video/views.py
 msgid "You cannot edit this channel."
@@ -10881,12 +10870,3 @@ msgstr "Résultats de la recherche"
 #: pod/xapi/apps.py
 msgid "Esup-Pod xAPI"
 msgstr "xAPI Esup-Pod"
-
-#~ msgid "Delete this record."
-#~ msgstr "Supprimer cet enregistrement."
-
-#~ msgid "Preview record."
-#~ msgstr "Prévisualiser l’enregistrement."
-
-#~ msgid "Number of video inside the channel"
-#~ msgstr "Nombre de vidéo à l’intérieur de la chaîne"
diff --git a/pod/locale/fr/LC_MESSAGES/djangojs.mo b/pod/locale/fr/LC_MESSAGES/djangojs.mo
index c1dd60b3f0..a84e3a9742 100644
Binary files a/pod/locale/fr/LC_MESSAGES/djangojs.mo and b/pod/locale/fr/LC_MESSAGES/djangojs.mo differ
diff --git a/pod/locale/fr/LC_MESSAGES/djangojs.po b/pod/locale/fr/LC_MESSAGES/djangojs.po
index 458326e710..b3fe2fdb24 100644
--- a/pod/locale/fr/LC_MESSAGES/djangojs.po
+++ b/pod/locale/fr/LC_MESSAGES/djangojs.po
@@ -5,7 +5,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Esup-Pod\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-11-27 12:02+0100\n"
+"POT-Creation-Date: 2024-12-11 11:36+0000\n"
 "PO-Revision-Date: \n"
 "Last-Translator: obado <bado@unice.fr>\n"
 "Language-Team: \n"
@@ -230,8 +230,9 @@ msgid "Time stamps"
 msgstr "Horodatages"
 
 #: pod/completion/static/js/caption_maker.js
-msgid "/80 characters"
-msgstr "80 caractères"
+#, javascript-format
+msgid "%s/%s characters"
+msgstr "%s/%s caractères"
 
 #: pod/completion/static/js/caption_maker.js
 msgid "Error loading caption file: "
diff --git a/pod/locale/nl/LC_MESSAGES/django.po b/pod/locale/nl/LC_MESSAGES/django.po
index 02d4a85449..b3a6957579 100644
--- a/pod/locale/nl/LC_MESSAGES/django.po
+++ b/pod/locale/nl/LC_MESSAGES/django.po
@@ -5,7 +5,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Pod\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-11-27 12:02+0100\n"
+"POT-Creation-Date: 2024-12-11 15:32+0000\n"
 "PO-Revision-Date: 2024-07-04 17:54+0200\n"
 "Last-Translator: obado <bado@unice.fr>\n"
 "Language-Team: \n"
@@ -101,11 +101,10 @@ msgstr ""
 msgid "Title"
 msgstr "Titel"
 
-#: pod/ai_enhancement/forms.py
-msgid ""
-"\n"
-"            Please choose a title between 1 and 250 characters.\n"
-"        "
+#: pod/ai_enhancement/forms.py pod/playlist/forms.py pod/quiz/forms.py
+#: pod/quiz/models.py
+#, python-format
+msgid "Please choose a title between 1 and %(max)s characters."
 msgstr ""
 
 #: pod/ai_enhancement/forms.py pod/live/models.py pod/main/forms.py
@@ -2771,15 +2770,15 @@ msgstr ""
 #: pod/import_video/views.py
 #, python-format
 msgid ""
-"This video “%(name)s” was uploaded to Pod; its origin is %(type)s: <a href="
-"\"%(url)s\" target=\"_blank\">%(url)s</a><br><br>%(desc)s"
+"This video “%(name)s” was uploaded to Pod; its origin is %(type)s: <a "
+"href=\"%(url)s\" target=\"_blank\">%(url)s</a><br><br>%(desc)s"
 msgstr ""
 
 #: pod/import_video/views.py
 #, python-format
 msgid ""
-"This video “%(name)s” was uploaded to Pod; its origin is Youtube: <a href="
-"\"%(url)s\" target=\"_blank\">%(url)s</a>"
+"This video “%(name)s” was uploaded to Pod; its origin is Youtube: <a "
+"href=\"%(url)s\" target=\"_blank\">%(url)s</a>"
 msgstr ""
 
 #: pod/import_video/views.py
@@ -4457,7 +4456,7 @@ msgstr ""
 msgid "Get the file name"
 msgstr ""
 
-#: pod/main/models.py pod/video/models.py
+#: pod/main/models.py
 msgid "order"
 msgstr ""
 
@@ -6145,8 +6144,8 @@ msgstr ""
 msgid ""
 "\n"
 "                <p>Hello,</p>\n"
-"                <p>%(owner)s invites you to the meeting <strong>"
-"%(meeting_title)s</strong>.</p>\n"
+"                <p>%(owner)s invites you to the meeting "
+"<strong>%(meeting_title)s</strong>.</p>\n"
 "                <p>here the link to join the meeting:\n"
 "                <a href=\"%(join_link)s\">%(join_link)s</a></p>\n"
 "                <p>You need this password to enter: <strong>%(password)s</"
@@ -6160,8 +6159,8 @@ msgstr ""
 msgid ""
 "\n"
 "                <p>Hello,</p>\n"
-"                <p>%(owner)s invites you to the meeting <strong>"
-"%(meeting_title)s</strong>.</p>\n"
+"                <p>%(owner)s invites you to the meeting "
+"<strong>%(meeting_title)s</strong>.</p>\n"
 "                <p>Start date: %(start_date_time)s </p>\n"
 "                <p>End date: %(end_date)s </p>\n"
 "                <p>here the link to join the meeting:\n"
@@ -6195,22 +6194,22 @@ msgstr ""
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Webinar mode has been successfully started for “%s” meeting."
+msgid "Webinar mode has been successfully started for “%(name)s” meeting."
 msgstr ""
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Error to start webinar mode for “%s” meeting: %s"
+msgid "Error to start webinar mode for “%(name)s” meeting: %(exc)s"
 msgstr ""
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Webinar mode has been successfully stopped for “%s” meeting."
+msgid "Webinar mode has been successfully stopped for “%(name)s” meeting."
 msgstr ""
 
 #: pod/meeting/webinar.py
 #, python-format
-msgid "Error to stop webinar mode for “%s” meeting: %s"
+msgid "Error to stop webinar mode for “%(name)s” meeting: %(exc)s"
 msgstr ""
 
 #: pod/meeting/webinar.py
@@ -6226,24 +6225,25 @@ msgstr ""
 #: pod/meeting/webinar_utils.py
 #, python-format
 msgid ""
-"There are too many webinars (%s) for the number of live gateways allocated "
-"(%s). The next meeting has been created but not like a webinar:%s %s [%s-"
-"%s].\n"
+"There are too many webinars (%(nb_webinars)s) for the number of live "
+"gateways allocated (%(nb_live_gateways)s). The next meeting has been created "
+"but not like a webinar: %(id)s %(name)s [%(start_at)s-%(end_at)s].\n"
 "Please fix the problem either by increasing the number of live gateways or "
 "by modifying/deleting one of the affected webinars (with the users’ "
 "agreement).\n"
-"Other webinars: %s"
+"Other webinars: %(names_webinars)s"
 msgstr ""
 
 #: pod/meeting/webinar_utils.py
 #, python-format
 msgid ""
-"<p>There are too many webinars (<b>%s</b>) for the number of live gateways "
-"allocated (<b>%s</b>). The next webinar has been created but <b>not like a "
-"webinar</b>:<ul><li><b>%s %s</b> [%s-%s].</li></ul><p>Please fix the problem "
-"either by increasing the number of live gateways or by modifying/deleting "
-"one of the affected webinars (with the users’ agreement).<br>Other webinars: "
-"<b>%s</b>"
+"<p>There are too many webinars (<strong>%(nb_webinars)s</strong>) for the "
+"number of live gateways allocated (<strong>%(nb_live_gateways)s</strong>). "
+"The next webinar has been created but <strong>not like a webinar</strong>:"
+"<ul><li><strong>%(id)s %(name)s</strong> [%(start_at)s-%(end_at)s].</li></"
+"ul><p>Please fix the problem either by increasing the number of live "
+"gateways or by modifying/deleting one of the affected webinars (with the "
+"users’ agreement).<br>Other webinars: <strong>%(names_webinars)s</strong>"
 msgstr ""
 
 #: pod/playlist/apps.py pod/playlist/models.py
@@ -6268,10 +6268,6 @@ msgstr ""
 msgid "Security informations"
 msgstr ""
 
-#: pod/playlist/forms.py pod/quiz/forms.py pod/quiz/models.py
-msgid "Please choose a title between 1 and 250 characters."
-msgstr ""
-
 #: pod/playlist/forms.py pod/playlist/models.py
 msgid "Please choose a description. This description is empty by default."
 msgstr ""
@@ -6312,9 +6308,9 @@ msgstr ""
 msgid "Please choose if this playlist is an autoplay playlist or not."
 msgstr ""
 
-#: pod/playlist/forms.py
-#, python-brace-format
-msgid "You cannot create a playlist named \"{FAVORITE_PLAYLIST_NAME}\""
+#: pod/playlist/forms.py pod/playlist/tests/test_forms.py
+#, python-format
+msgid "You cannot create a playlist named “%(name)s”"
 msgstr ""
 
 #: pod/playlist/forms.py
@@ -6344,13 +6340,6 @@ msgstr ""
 msgid "Private"
 msgstr ""
 
-#: pod/playlist/models.py
-#, python-brace-format
-msgid ""
-"Please choose a title between 1 and {__MAX_LENGTH_FOR_PLAYLIST_NAME__} "
-"characters."
-msgstr ""
-
 #: pod/playlist/models.py
 msgid ""
 "Selecting this setting causes your playlist to be promoted on the page "
@@ -6711,6 +6700,7 @@ msgid "contact its owner"
 msgstr ""
 
 #: pod/playlist/templatetags/favorites_playlist.py
+#: pod/playlist/tests/test_forms.py
 msgid "Favorites"
 msgstr ""
 
@@ -6718,10 +6708,6 @@ msgstr ""
 msgid "This field is required."
 msgstr ""
 
-#: pod/playlist/tests/test_forms.py
-msgid "You cannot create a playlist named \"Favorites\""
-msgstr ""
-
 #: pod/playlist/tests/test_views.py pod/playlist/views.py
 #, python-format
 msgid "Playlist: %(name)s"
@@ -6735,6 +6721,10 @@ msgstr ""
 msgid "The playlist has been deleted."
 msgstr ""
 
+#: pod/playlist/views.py
+msgid "Delete the playlist"
+msgstr ""
+
 #: pod/playlist/views.py
 #, python-format
 msgid "Edit the playlist “%(pname)s”"
@@ -6749,8 +6739,8 @@ msgid "The data sent to create the playlist are invalid."
 msgstr ""
 
 #: pod/playlist/views.py
-#, python-brace-format
-msgid "Edit playlist “{playlist.name}”"
+#, python-format
+msgid "Edit playlist “%(name)s”"
 msgstr ""
 
 #: pod/playlist/views.py
@@ -7123,7 +7113,7 @@ msgstr ""
 msgid "Quizzes"
 msgstr ""
 
-#: pod/quiz/models.py
+#: pod/quiz/models.py pod/quiz/tests/test_models.py
 msgid "Quiz of video"
 msgstr ""
 
@@ -7736,8 +7726,8 @@ msgstr ""
 #: pod/video/templates/videos/video-element.html
 msgid ""
 "To view this video please enable JavaScript, and consider upgrading to a web "
-"browser that <a href=\"https://videojs.com/html5-video-support/\" target="
-"\"_blank\">supports HTML5 video</a>"
+"browser that <a href=\"https://videojs.com/html5-video-support/\" "
+"target=\"_blank\">supports HTML5 video</a>"
 msgstr ""
 
 #: pod/recorder/templates/recorder/link_record.html
@@ -9767,7 +9757,7 @@ msgstr "Voer een titel in."
 
 #: pod/video/utils.py
 #, python-format
-msgid "Please enter a %s from 2 to %s characters."
+msgid "Please enter a %(field_name)s from 2 to %(max_length)s characters."
 msgstr ""
 
 #: pod/video/views.py
diff --git a/pod/locale/nl/LC_MESSAGES/djangojs.po b/pod/locale/nl/LC_MESSAGES/djangojs.po
index 206c8637b4..4eff580450 100644
--- a/pod/locale/nl/LC_MESSAGES/djangojs.po
+++ b/pod/locale/nl/LC_MESSAGES/djangojs.po
@@ -5,7 +5,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Esup-Pod\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2024-11-27 12:02+0100\n"
+"POT-Creation-Date: 2024-12-11 11:36+0000\n"
 "PO-Revision-Date: 2024-06-04 16:20+0200\n"
 "Last-Translator: obado <bado@unice.fr>\n"
 "Language-Team: \n"
@@ -212,7 +212,8 @@ msgid "Time stamps"
 msgstr ""
 
 #: pod/completion/static/js/caption_maker.js
-msgid "/80 characters"
+#, javascript-format
+msgid "%s/%s characters"
 msgstr ""
 
 #: pod/completion/static/js/caption_maker.js
diff --git a/pod/main/tasks.py b/pod/main/tasks.py
index 8cd67a6a7b..1a3f8c135d 100644
--- a/pod/main/tasks.py
+++ b/pod/main/tasks.py
@@ -5,7 +5,7 @@
 
 
 @app.task(bind=True)
-def task_start_encode(self, video_id):
+def task_start_encode(self, video_id: int) -> None:
     """Start video encoding with Celery."""
     print("CELERY START ENCODE VIDEO ID %s" % video_id)
     from pod.video_encode_transcript.encode import encode_video
@@ -14,7 +14,7 @@ def task_start_encode(self, video_id):
 
 
 @app.task(bind=True)
-def task_start_transcript(self, video_id):
+def task_start_transcript(self, video_id: int) -> None:
     """Start video transcripting with Celery."""
     print("CELERY START TRANSCRIPT VIDEO ID %s" % video_id)
     from pod.video_encode_transcript.transcript import main_threaded_transcript
@@ -24,8 +24,8 @@ def task_start_transcript(self, video_id):
 
 @app.task(bind=True)
 def task_start_encode_studio(
-    self, recording_id, video_output, videos, subtime, presenter
-):
+    self, recording_id: int, video_output, videos, subtime, presenter
+) -> None:
     """Start studio record encoding with Celery."""
     print("CELERY START ENCODE VIDEOS FROM STUDIO RECORDING ID %s" % recording_id)
     from pod.video_encode_transcript.encode import encode_video_studio
@@ -34,7 +34,7 @@ def task_start_encode_studio(
 
 
 @app.task(bind=True)
-def task_start_live_transcription(self, url, slug, model, filepath):
+def task_start_live_transcription(self, url, slug, model, filepath) -> None:
     """Start live transcription with Celery."""
     print("CELERY START LIVE TRANSCRIPTION %s" % slug)
     from pod.live.live_transcript import transcribe
@@ -48,7 +48,7 @@ def task_start_live_transcription(self, url, slug, model, filepath):
 
 
 @app.task(bind=True)
-def task_end_live_transcription(self, slug):
+def task_end_live_transcription(self, slug) -> None:
     """End live transcription with Celery."""
     print("CELERY END LIVE TRANSCRIPTION %s" % slug)
     broadcaster = Broadcaster.objects.get(slug=slug)
@@ -61,7 +61,7 @@ def task_end_live_transcription(self, slug):
 @app.task(bind=True)
 def task_start_bbb_presentation_encode_and_upload_to_pod(
     self, record_id: int, url: str, extension: str
-):
+) -> None:
     """Start BBB presentation encoding with Celery, then upload to Pod."""
     print("CELERY START BBB ENCODE PRESENTATION/UPLOAD RECORD ID %s" % record_id)
     from pod.import_video.views import bbb_encode_presentation_and_upload_to_pod
@@ -72,7 +72,7 @@ def task_start_bbb_presentation_encode_and_upload_to_pod(
 @app.task(bind=True)
 def task_start_bbb_presentation_encode_and_move_to_destination(
     self, filename: str, url: str, dest_file: str
-):
+) -> None:
     """Start BBB presentation encoding with Celery, then move the video file."""
     print("CELERY START BBB ENCODE PRESENTATION/MOVE %s" % filename)
     from pod.import_video.views import bbb_encode_presentation_and_move_to_destination
diff --git a/pod/main/templatetags/flat_page_edito_filter.py b/pod/main/templatetags/flat_page_edito_filter.py
index 536bd399f8..54377fb9ee 100644
--- a/pod/main/templatetags/flat_page_edito_filter.py
+++ b/pod/main/templatetags/flat_page_edito_filter.py
@@ -323,7 +323,7 @@ def render_next_events(uniq_id, params, current_site, debug_elts):
     return part_content
 
 
-def render_html(uniq_id, params, current_site, debug_elts):
+def render_html(uniq_id, params, current_site, debug_elts) -> str:
     """Render block with html content."""
     debug_elts.append("Call function render_html")
 
diff --git a/pod/main/test_settings.py b/pod/main/test_settings.py
index 61a0cdbb7b..6911b38ad6 100644
--- a/pod/main/test_settings.py
+++ b/pod/main/test_settings.py
@@ -45,7 +45,7 @@
         "ENGINE": "django.db.backends.sqlite3",
         "NAME": "db-test.sqlite",
         "OPTIONS": {
-            "timeout": 20,
+            "timeout": 30,
         },
     }
 }
diff --git a/pod/meeting/webinar.py b/pod/meeting/webinar.py
index ea72b191e8..af3245ce45 100644
--- a/pod/meeting/webinar.py
+++ b/pod/meeting/webinar.py
@@ -17,7 +17,7 @@
 log = logging.getLogger("webinar")
 
 
-def start_webinar(request: WSGIRequest, meet_id: int):
+def start_webinar(request: WSGIRequest, meet_id: int) -> None:
     """Start a webinar and send a thread to stop it automatically at the end."""
     try:
         # Get the current meeting
@@ -33,8 +33,8 @@ def start_webinar(request: WSGIRequest, meet_id: int):
         display_message_with_icon(
             request,
             messages.INFO,
-            _("Webinar mode has been successfully started for “%s” meeting.")
-            % (meeting.name),
+            _("Webinar mode has been successfully started for “%(name)s” meeting.")
+            % ({"name": meeting.name}),
         )
         # Manage enable_chat is False by default
         if meeting.enable_chat is False:
@@ -42,17 +42,18 @@ def start_webinar(request: WSGIRequest, meet_id: int):
             toggle_rtmp_gateway(meet_id)
     except Exception as exc:
         log.error(
-            "Error to start webinar mode for “%s” meeting: %s" % (meet_id, str(exc))
+            "Error to start webinar mode for “%(id)s” meeting: %(exc)s"
+            % {"id": meet_id, "exc": str(exc)}
         )
         display_message_with_icon(
             request,
             messages.ERROR,
-            _("Error to start webinar mode for “%s” meeting: %s")
-            % (meeting.name, str(exc)),
+            _("Error to start webinar mode for “%(name)s” meeting: %(exc)s")
+            % {"name": meeting.name, "exc": str(exc)},
         )
 
 
-def stop_webinar(request: WSGIRequest, meet_id: int):
+def stop_webinar(request: WSGIRequest, meet_id: int) -> None:
     """Stop the webinar."""
     try:
         # Get the current meeting
@@ -64,20 +65,23 @@ def stop_webinar(request: WSGIRequest, meet_id: int):
         display_message_with_icon(
             request,
             messages.INFO,
-            _("Webinar mode has been successfully stopped for “%s” meeting.")
-            % (meeting.name),
+            _("Webinar mode has been successfully stopped for “%(name)s” meeting.")
+            % {"name": meeting.name},
         )
     except Exception as exc:
-        log.error("Error to stop webinar mode for “%s” meeting: %s" % (meet_id, str(exc)))
+        log.error(
+            "Error to stop webinar mode for “%(id)s” meeting: %(exc)s"
+            % {"id": meet_id, "exc": str(exc)}
+        )
         display_message_with_icon(
             request,
             messages.ERROR,
-            _("Error to stop webinar mode for “%s” meeting: %s")
-            % (meeting.name, str(exc)),
+            _("Error to stop webinar mode for “%(name)s” meeting: %(exc)s")
+            % {"name": meeting.name, "exc": str(exc)},
         )
 
 
-def start_webinar_livestream(pod_host: str, meet_id: int):
+def start_webinar_livestream(pod_host: str, meet_id: int) -> None:
     """Run the steps to start the webinar livestream."""
     try:
         if pod_host.find("localhost") != -1:
@@ -103,7 +107,7 @@ def start_webinar_livestream(pod_host: str, meet_id: int):
         raise ValueError(str(exc))
 
 
-def stop_webinar_livestream(meet_id: int, force: bool):
+def stop_webinar_livestream(meet_id: int, force: bool) -> None:
     """Stop the webinar when meeting is stopped or when user forces to stop it."""
     try:
         log.info("stop_webinar_livestream %s: %s" % (meet_id, "stop"))
@@ -135,7 +139,7 @@ def stop_webinar_livestream(meet_id: int, force: bool):
             raise ValueError(str(exc))
 
 
-def wait_meeting_is_stopped(meeting: Meeting):
+def wait_meeting_is_stopped(meeting: Meeting) -> None:
     """Check regularly if meeting is stopped.
 
     If meeting is running, wait to make another check (5h max).
@@ -186,7 +190,7 @@ def manage_meeting_livestream(meeting: Meeting):
     return livestream
 
 
-def start_rtmp_gateway(pod_host: str, meet_id: int, livestream_id: int):
+def start_rtmp_gateway(pod_host: str, meet_id: int, livestream_id: int) -> None:
     """Run the start command for SIPMediaGW RTMP gateway."""
     # Get the current meeting
     meeting = Meeting.objects.get(id=meet_id)
@@ -259,7 +263,7 @@ def stop_rtmp_gateway(meet_id: int, livestream_id: int):
         raise ValueError(mark_safe(message))
 
 
-def toggle_rtmp_gateway(meet_id: int):
+def toggle_rtmp_gateway(meet_id: int) -> None:
     """Run the toggle (to show chat or not) command for SIPMediaGW RTMP gateway."""
     # Get the current meeting
     meeting = Meeting.objects.get(id=meet_id)
@@ -296,7 +300,7 @@ def toggle_rtmp_gateway(meet_id: int):
         log.error("No livestream object found for webinar id %s" % meet_id)
 
 
-def chat_rtmp_gateway(meet_id: int, msg: str):
+def chat_rtmp_gateway(meet_id: int, msg: str) -> None:
     """Send message command to SIPMediaGW RTMP gateway."""
     # Get the current meeting
     meeting = Meeting.objects.get(id=meet_id)
diff --git a/pod/meeting/webinar_utils.py b/pod/meeting/webinar_utils.py
index 0d49ffd14b..fe2835f801 100644
--- a/pod/meeting/webinar_utils.py
+++ b/pod/meeting/webinar_utils.py
@@ -96,48 +96,50 @@ def search_for_available_livegateway(
 
 def send_email_webinars(
     meeting: Meeting, nb_webinars: int, nb_live_gateways: int, names_webinars: str
-):
+) -> None:
     """Send email notification to administrators when too many webinars."""
     subject = "[" + __TITLE_SITE__ + "] %s" % _("Too many webinars")
     message = _(
-        "There are too many webinars (%s) for the number of "
-        "live gateways allocated (%s). "
-        "The next meeting has been created but not like a webinar:%s %s [%s-%s].\n"
+        "There are too many webinars (%(nb_webinars)s) for the number of "
+        "live gateways allocated (%(nb_live_gateways)s). "
+        "The next meeting has been created but not like a webinar: %(id)s %(name)s [%(start_at)s-%(end_at)s].\n"
         "Please fix the problem either by increasing the number of live gateways "
         "or by modifying/deleting one of the affected webinars "
         "(with the users’ agreement).\n"
-        "Other webinars: %s"
-    ) % (
-        nb_webinars,
-        nb_live_gateways,
-        meeting.id,
-        meeting.name,
-        meeting.start_at,
-        meeting.start_at + meeting.expected_duration,
-        names_webinars,
-    )
+        "Other webinars: %(names_webinars)s"
+    ) % {
+        "nb_webinars": nb_webinars,
+        "nb_live_gateways": nb_live_gateways,
+        "id": meeting.id,
+        "name": meeting.name,
+        "start_at": meeting.start_at,
+        "end_at": meeting.start_at + meeting.expected_duration,
+        "names_webinars": names_webinars,
+    }
+
     html_message = _(
-        "<p>There are too many webinars (<b>%s</b>) for the number of "
-        "live gateways allocated (<b>%s</b>). "
-        "The next webinar has been created but <b>not like a webinar</b>:"
-        "<ul><li><b>%s %s</b> [%s-%s].</li></ul><p>"
+        "<p>There are too many webinars (<strong>%(nb_webinars)s</strong>) for the number of "
+        "live gateways allocated (<strong>%(nb_live_gateways)s</strong>). "
+        "The next webinar has been created but <strong>not like a webinar</strong>:"
+        "<ul><li><strong>%(id)s %(name)s</strong> [%(start_at)s-%(end_at)s].</li></ul><p>"
         "Please fix the problem either by increasing the number of live gateways "
         "or by modifying/deleting one of the affected webinars "
         "(with the users’ agreement).<br>"
-        "Other webinars: <b>%s</b>"
-    ) % (
-        nb_webinars,
-        nb_live_gateways,
-        meeting.id,
-        meeting.name,
-        meeting.start_at,
-        meeting.start_at + meeting.expected_duration,
-        names_webinars,
-    )
+        "Other webinars: <strong>%(names_webinars)s</strong>"
+    ) % {
+        "nb_webinars": nb_webinars,
+        "nb_live_gateways": nb_live_gateways,
+        "id": meeting.id,
+        "name": meeting.name,
+        "start_at": meeting.start_at,
+        "end_at": meeting.start_at + meeting.expected_duration,
+        "names_webinars": names_webinars,
+    }
+
     mail_admins(subject, message, fail_silently=False, html_message=html_message)
 
 
-def update_livestream_event(livestream, meeting):
+def update_livestream_event(livestream, meeting) -> None:
     """Update event livestream from meeeting attributes."""
     if livestream.event.title != meeting.name:
         livestream.event.title = meeting.name
@@ -187,7 +189,7 @@ def manage_webinar(
         livestream.event.delete()
 
 
-def create_livestream_event(meeting: Meeting, live_gateway: LiveGateway):
+def create_livestream_event(meeting: Meeting, live_gateway: LiveGateway) -> None:
     """Create a livestream and an event for a new webinar."""
     # Create live event
     event = Event.objects.create(
diff --git a/pod/playlist/forms.py b/pod/playlist/forms.py
index a684b7ec92..129cf9a8e6 100644
--- a/pod/playlist/forms.py
+++ b/pod/playlist/forms.py
@@ -60,7 +60,9 @@ class Meta:
                 "aria-describedby": "id_nameHelp",
             },
         ),
-        help_text=_("Please choose a title between 1 and 250 characters."),
+        help_text=_(
+            "Please choose a title between 1 and %(max)s characters."
+        ) % {"max": 250}
     )
     description = forms.CharField(
         label=_("Description"),
@@ -156,16 +158,17 @@ def __init__(self, *args, **kwargs) -> None:
             if "promoted" in self.fields:
                 del self.fields["promoted"]
 
-    def clean_name(self):
+    def clean_name(self) -> str:
         """Check if the playlist name asked is correct."""
         name = self.cleaned_data["name"]
         if name == FAVORITE_PLAYLIST_NAME:
             raise forms.ValidationError(
-                _(f'You cannot create a playlist named "{FAVORITE_PLAYLIST_NAME}"')
+                _("You cannot create a playlist named “%(name)s”")
+                % {"name": FAVORITE_PLAYLIST_NAME}
             )
         return name
 
-    def clean_add_owner(self, cleaned_data):
+    def clean_add_owner(self, cleaned_data) -> None:
         """Check if the owner is correct."""
         if "additional_owners" in cleaned_data.keys() and isinstance(
             self.cleaned_data["additional_owners"], QuerySet
diff --git a/pod/playlist/tests/test_forms.py b/pod/playlist/tests/test_forms.py
index 3d8581e108..20ead4a741 100644
--- a/pod/playlist/tests/test_forms.py
+++ b/pod/playlist/tests/test_forms.py
@@ -106,7 +106,7 @@ def test_name_validation_for_public_playlist(self):
         self.assertFalse(invalid_form.is_valid())
         self.assertEqual(
             invalid_form.errors["name"][0],
-            _('You cannot create a playlist named "Favorites"'),
+            _('You cannot create a playlist named “%(name)s”') % {"name": _("Favorites")},
         )
         print(" --->  test_name_validation_for_public_playlist ok")
 
@@ -129,7 +129,7 @@ def test_name_validation_for_private_playlist(self) -> None:
         self.assertFalse(invalid_form.is_valid())
         self.assertEqual(
             invalid_form.errors["name"][0],
-            _('You cannot create a playlist named "Favorites"'),
+            _('You cannot create a playlist named “%(name)s”') % {"name": _("Favorites")},
         )
         print(" --->  test_name_validation_for_private_playlist ok")
 
@@ -154,7 +154,7 @@ def test_name_validation_for_protected_playlist(self) -> None:
         self.assertFalse(invalid_form.is_valid())
         self.assertEqual(
             invalid_form.errors["name"][0],
-            _('You cannot create a playlist named "Favorites"'),
+            _('You cannot create a playlist named “%(name)s”') % {"name": _("Favorites")},
         )
         print(" --->  test_name_validation_for_protected_playlist ok")
 
diff --git a/pod/playlist/views.py b/pod/playlist/views.py
index 53f794fb50..a5e79cce6a 100644
--- a/pod/playlist/views.py
+++ b/pod/playlist/views.py
@@ -474,7 +474,7 @@ def handle_get_request_for_add_or_edit_function(request: WSGIRequest, slug: str)
             or request.user in get_additional_owners(playlist)
         ) and playlist.editable:
             form = PlaylistForm(instance=playlist, user=request.user)
-            page_title = _(f"Edit playlist “{playlist.name}”")
+            page_title = _("Edit playlist “%(name)s”") % {"name": playlist.name}
         else:
             return redirect(reverse("playlist:list"))
     else:
diff --git a/pod/quiz/forms.py b/pod/quiz/forms.py
index 5f3fc9e05d..2b5cf759ce 100644
--- a/pod/quiz/forms.py
+++ b/pod/quiz/forms.py
@@ -36,7 +36,9 @@ class QuestionForm(forms.Form):
         label=_("Title"),
         required=True,
         widget=forms.TextInput(attrs={"placeholder": _("Your question")}),
-        help_text=_("Please choose a title between 1 and 250 characters."),
+        help_text=_(
+            "Please choose a title between 1 and %(max)s characters."
+        ) % {"max": 250}
     )
     explanation = forms.CharField(
         label=_("Explanation"),
diff --git a/pod/quiz/models.py b/pod/quiz/models.py
index 8120ed85fd..daa0b34a2f 100644
--- a/pod/quiz/models.py
+++ b/pod/quiz/models.py
@@ -98,7 +98,9 @@ class Question(models.Model):
     title = models.CharField(
         verbose_name=_("Title"),
         max_length=250,
-        help_text=_("Please choose a title between 1 and 250 characters."),
+        help_text=_(
+            "Please choose a title between 1 and %(max)s characters."
+        ) % {"max": 250}
     )
     explanation = models.TextField(
         verbose_name=_("Explanation"),
diff --git a/pod/video/utils.py b/pod/video/utils.py
index efe465047b..6d0d4f912b 100644
--- a/pod/video/utils.py
+++ b/pod/video/utils.py
@@ -299,6 +299,9 @@ def verify_field_length(field, field_name: str = "title", max_length: int = 100)
         msg.append(_("Please enter a title."))
     elif len(field) < 2 or len(field) > max_length:
         msg.append(
-            _("Please enter a %s from 2 to %s characters." % (field_name, max_length))
+            _(
+                "Please enter a %(field_name)s from 2 to %(max_length)s characters."
+                % {"field_name": field_name, "max_length": max_length}
+            )
         )
     return msg