diff --git a/src/i18n/da-DK.properties b/src/i18n/da-DK.properties
index 65faa249b..2da34d9d0 100644
--- a/src/i18n/da-DK.properties
+++ b/src/i18n/da-DK.properties
@@ -76,10 +76,16 @@ media_play=Afspil
 media_pause=Pause
 # Label for Settings button in media player
 media_settings=Indstillinger
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volumen
 # Used in ARIA label for timescrubber progress
 of=af
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Klik et vilkårligt sted for at føje en kommentar
 360_images=360-graders billeder
 # 3-dimensional model file type
 3d_models=3D-modeller
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/de-DE.properties b/src/i18n/de-DE.properties
index a0cecc0f4..57a02bf46 100644
--- a/src/i18n/de-DE.properties
+++ b/src/i18n/de-DE.properties
@@ -76,10 +76,16 @@ media_play=Wiedergeben
 media_pause=Pause
 # Label for Settings button in media player
 media_settings=Einstellungen
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Lautstärke
 # Used in ARIA label for timescrubber progress
 of=von
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Klicken Sie an einer beliebigen Stelle, um einen Ko
 360_images=360-Grad-Bilder
 # 3-dimensional model file type
 3d_models=3D-Modelle
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/en-AU.properties b/src/i18n/en-AU.properties
index c75f188d0..a65189b04 100644
--- a/src/i18n/en-AU.properties
+++ b/src/i18n/en-AU.properties
@@ -76,10 +76,16 @@ media_play=Play
 media_pause=Pause
 # Label for Settings button in media player
 media_settings=Settings
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=of
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Click anywhere to add a comment to the document
 360_images=360-degree images
 # 3-dimensional model file type
 3d_models=3D models
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/en-CA.properties b/src/i18n/en-CA.properties
index c75f188d0..a65189b04 100644
--- a/src/i18n/en-CA.properties
+++ b/src/i18n/en-CA.properties
@@ -76,10 +76,16 @@ media_play=Play
 media_pause=Pause
 # Label for Settings button in media player
 media_settings=Settings
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=of
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Click anywhere to add a comment to the document
 360_images=360-degree images
 # 3-dimensional model file type
 3d_models=3D models
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/en-GB.properties b/src/i18n/en-GB.properties
index c75f188d0..a65189b04 100644
--- a/src/i18n/en-GB.properties
+++ b/src/i18n/en-GB.properties
@@ -76,10 +76,16 @@ media_play=Play
 media_pause=Pause
 # Label for Settings button in media player
 media_settings=Settings
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=of
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Click anywhere to add a comment to the document
 360_images=360-degree images
 # 3-dimensional model file type
 3d_models=3D models
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/es-ES.properties b/src/i18n/es-ES.properties
index 83ca393b4..edc44cfdf 100644
--- a/src/i18n/es-ES.properties
+++ b/src/i18n/es-ES.properties
@@ -76,10 +76,16 @@ media_play=Reproducir
 media_pause=Pausar
 # Label for Settings button in media player
 media_settings=Configuración
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volumen
 # Used in ARIA label for timescrubber progress
 of=de
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Haga clic en cualquier parte para añadir un coment
 360_images=Imágenes de 360 grados
 # 3-dimensional model file type
 3d_models=Modelos 3D
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/fi-FI.properties b/src/i18n/fi-FI.properties
index b88d323bb..e7921e69f 100644
--- a/src/i18n/fi-FI.properties
+++ b/src/i18n/fi-FI.properties
@@ -76,10 +76,16 @@ media_play=Toista
 media_pause=Tauko
 # Label for Settings button in media player
 media_settings=Asetukset
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Määrä
 # Used in ARIA label for timescrubber progress
 of=/
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Lisää kommentti asiakirjaan napsauttamalla mitä
 360_images=360 asteen kuvat
 # 3-dimensional model file type
 3d_models=3D-mallit
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/fr-CA.properties b/src/i18n/fr-CA.properties
index f4c399413..f77b89229 100644
--- a/src/i18n/fr-CA.properties
+++ b/src/i18n/fr-CA.properties
@@ -76,10 +76,16 @@ media_play=Lecture
 media_pause=Pause
 # Label for Settings button in media player
 media_settings=Paramètres
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=sur
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Cliquez n'importe où dans le document pour y ajout
 360_images=les images à 360 degrés
 # 3-dimensional model file type
 3d_models=les modèles 3D
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/fr-FR.properties b/src/i18n/fr-FR.properties
index f4c399413..f77b89229 100644
--- a/src/i18n/fr-FR.properties
+++ b/src/i18n/fr-FR.properties
@@ -76,10 +76,16 @@ media_play=Lecture
 media_pause=Pause
 # Label for Settings button in media player
 media_settings=Paramètres
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=sur
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Cliquez n'importe où dans le document pour y ajout
 360_images=les images à 360 degrés
 # 3-dimensional model file type
 3d_models=les modèles 3D
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/it-IT.properties b/src/i18n/it-IT.properties
index bf6d71eb5..da9c2d58f 100644
--- a/src/i18n/it-IT.properties
+++ b/src/i18n/it-IT.properties
@@ -76,10 +76,16 @@ media_play=Riproduci
 media_pause=Sospendi
 # Label for Settings button in media player
 media_settings=Impostazioni
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=di
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Fai clic in un punto qualsiasi per aggiungere un co
 360_images=Immagini a 360 gradi
 # 3-dimensional model file type
 3d_models=Modelli 3D
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/ja-JP.properties b/src/i18n/ja-JP.properties
index e0792a5eb..71937f74d 100644
--- a/src/i18n/ja-JP.properties
+++ b/src/i18n/ja-JP.properties
@@ -76,10 +76,16 @@ media_play=再生
 media_pause=一時停止
 # Label for Settings button in media player
 media_settings=設定
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=ボリューム
 # Used in ARIA label for timescrubber progress
 of=/
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=ドキュメントにコメントをつけるには
 360_images=360度画像
 # 3-dimensional model file type
 3d_models=3Dモデル
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/ko-KR.properties b/src/i18n/ko-KR.properties
index 25c368ea6..832d07c84 100644
--- a/src/i18n/ko-KR.properties
+++ b/src/i18n/ko-KR.properties
@@ -76,10 +76,16 @@ media_play=재생
 media_pause=일시 중지
 # Label for Settings button in media player
 media_settings=설정
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=볼륨
 # Used in ARIA label for timescrubber progress
 of=/
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=아무 곳이나 클릭하여 문서에 코멘트
 360_images=360도 이미지
 # 3-dimensional model file type
 3d_models=3D 모델
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/nb-NO.properties b/src/i18n/nb-NO.properties
index 7fd2eaa5b..c344587de 100644
--- a/src/i18n/nb-NO.properties
+++ b/src/i18n/nb-NO.properties
@@ -76,10 +76,16 @@ media_play=Spill av
 media_pause=Sett på pause
 # Label for Settings button in media player
 media_settings=Innstillinger
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volum
 # Used in ARIA label for timescrubber progress
 of=av
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Klikk hvor som helst for å legge til en kommentar
 360_images=360-graders bilder
 # 3-dimensional model file type
 3d_models=3D-modeller
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/nl-NL.properties b/src/i18n/nl-NL.properties
index 6cf723c92..c0bde4963 100644
--- a/src/i18n/nl-NL.properties
+++ b/src/i18n/nl-NL.properties
@@ -76,10 +76,16 @@ media_play=Afspelen
 media_pause=Pauzeren
 # Label for Settings button in media player
 media_settings=Instellingen
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=van
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Klik ergens om een opmerking aan het document toe t
 360_images=360°-afbeeldingen
 # 3-dimensional model file type
 3d_models=3D-modellen
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/pl-PL.properties b/src/i18n/pl-PL.properties
index 6033d7a94..2ca3af74c 100644
--- a/src/i18n/pl-PL.properties
+++ b/src/i18n/pl-PL.properties
@@ -76,10 +76,16 @@ media_play=Odtwórz
 media_pause=Wstrzymaj
 # Label for Settings button in media player
 media_settings=Ustawienia
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Wolumin
 # Used in ARIA label for timescrubber progress
 of=z
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Aby dodać komentarz do dokumentu, kliknij w dowoln
 360_images=Obrazy 360-stopniowe
 # 3-dimensional model file type
 3d_models=Modele 3D
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/pt-BR.properties b/src/i18n/pt-BR.properties
index b852506c8..00682de48 100644
--- a/src/i18n/pt-BR.properties
+++ b/src/i18n/pt-BR.properties
@@ -76,10 +76,16 @@ media_play=Reproduzir
 media_pause=Pausar
 # Label for Settings button in media player
 media_settings=Configurações
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volume
 # Used in ARIA label for timescrubber progress
 of=de
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Clique em qualquer lugar para fazer um comentário
 360_images=Imagens em 360 graus
 # 3-dimensional model file type
 3d_models=Modelos 3D
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/ru-RU.properties b/src/i18n/ru-RU.properties
index ba281640f..195255a6c 100644
--- a/src/i18n/ru-RU.properties
+++ b/src/i18n/ru-RU.properties
@@ -76,10 +76,16 @@ media_play=Воспроизвести
 media_pause=Приостановить
 # Label for Settings button in media player
 media_settings=Настройки
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Объем
 # Used in ARIA label for timescrubber progress
 of=из
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Нажмите на любую часть доку
 360_images=панорамные изображения
 # 3-dimensional model file type
 3d_models=3D-модели
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/sv-SE.properties b/src/i18n/sv-SE.properties
index e84eaf2f5..5c5515765 100644
--- a/src/i18n/sv-SE.properties
+++ b/src/i18n/sv-SE.properties
@@ -76,10 +76,16 @@ media_play=Spela upp
 media_pause=Pausa
 # Label for Settings button in media player
 media_settings=Inställningar
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Volym
 # Used in ARIA label for timescrubber progress
 of=av
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Klicka var som helst för att lägga till en kommen
 360_images=360-graders bilder
 # 3-dimensional model file type
 3d_models=3D-modeller
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/tr-TR.properties b/src/i18n/tr-TR.properties
index ec252ec5e..5ee06afd3 100644
--- a/src/i18n/tr-TR.properties
+++ b/src/i18n/tr-TR.properties
@@ -76,10 +76,16 @@ media_play=Oynat
 media_pause=Duraklat
 # Label for Settings button in media player
 media_settings=Ayarlar
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=Düzey
 # Used in ARIA label for timescrubber progress
 of=/
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=Belgeye bir yorum eklemek için herhangi bir yere t
 360_images=360 derece görüntüler
 # 3-dimensional model file type
 3d_models=3D modeller
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/zh-CN.properties b/src/i18n/zh-CN.properties
index 04fc9bee7..d01cd6301 100644
--- a/src/i18n/zh-CN.properties
+++ b/src/i18n/zh-CN.properties
@@ -76,10 +76,16 @@ media_play=播放
 media_pause=暂停
 # Label for Settings button in media player
 media_settings=设置
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=的
 # Used in ARIA label for timescrubber progress
 of=量
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=点击任意位置均可向该文档添加评论
 360_images=360 度图像
 # 3-dimensional model file type
 3d_models=3D 模型
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish
diff --git a/src/i18n/zh-TW.properties b/src/i18n/zh-TW.properties
index d4be7c921..94a80442a 100644
--- a/src/i18n/zh-TW.properties
+++ b/src/i18n/zh-TW.properties
@@ -76,10 +76,16 @@ media_play=播放
 media_pause=暫停
 # Label for Settings button in media player
 media_settings=設定
+# Label for subtitles/closed-captions in media player
+media_subtitles_cc=Subtitles/Closed Captions
 # Used in ARIA label for volume
 volume=音量
 # Used in ARIA label for timescrubber progress
 of=/
+# Label for subtitles in media player
+subtitles=Subtitles
+# Label for turning off subtitles in media player
+off=Off
 
 
 # 3D Preview
@@ -144,3 +150,23 @@ notification_annotation_mode=在任何位置上按一下，即可新增留言至
 360_images=360 度影像
 # 3-dimensional model file type
 3d_models=3D 模型
+
+# Languages
+chinese=Chinese
+danish=Danish
+dutch=Dutch
+english=English
+finnish=Finnish
+french=French
+german=German
+hebrew=Hebrew
+italian=Italian
+japanese=Japanese
+korean=Korean
+norwegian=Norwegian
+polish=Polish
+portuguese=Portuguese
+russian=Russian
+spanish=Spanish
+swedish=Swedish
+turkish=Turkish