[TASK] Add "locale needs to be on server" (#1622)

* [TASK] Add "locale needs to be on server" * [TASK] Add "locale needs to be on server" (2) The Github web editor swallowed the command
TYPO3-Documentation · Dec 2, 2021 · af4f552 · af4f552
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commit af4f552
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/Documentation/ApiOverview/SiteHandling/AddLanguages.rst b/Documentation/ApiOverview/SiteHandling/AddLanguages.rst
@@ -158,7 +158,8 @@ locale
 
 :aspect:`Description`
     The locale to use for this language (Is set during frontend rendering for example)
-    See `locale identifiers <https://gist.github.com/jasef/337431c43c3addb2cbd5eb215b376179>`__
+    See `locale identifiers <https://gist.github.com/jasef/337431c43c3addb2cbd5eb215b376179>`__.
+    That locale needs to be installed on the server. In a Linux environment, you can see installed locales with `locale -a`.
 
 :aspect:`Example`
     `en_UK`