diff --git a/cms/djangoapps/contentstore/video_storage_handlers.py b/cms/djangoapps/contentstore/video_storage_handlers.py
index 1433bf2fc3..87086c9951 100644
--- a/cms/djangoapps/contentstore/video_storage_handlers.py
+++ b/cms/djangoapps/contentstore/video_storage_handlers.py
@@ -724,7 +724,9 @@ def get_all_transcript_languages():
     third_party_transcription_languages.update(cielo_fidelity['PREMIUM']['languages'])
     third_party_transcription_languages.update(cielo_fidelity['PROFESSIONAL']['languages'])
 
-    all_languages_dict = dict(settings.ALL_LANGUAGES, **third_party_transcription_languages)
+    # combines ALL_LANGUAGES with additional languages that should be supported for transcripts
+    extended_all_languages = settings.ALL_LANGUAGES + settings.EXTENDED_VIDEO_TRANSCRIPT_LANGUAGES
+    all_languages_dict = dict(extended_all_languages, **third_party_transcription_languages)
     # Return combined system settings and 3rd party transcript languages.
     all_languages = []
     for key, value in sorted(all_languages_dict.items(), key=lambda k_v: k_v[1]):
diff --git a/cms/envs/common.py b/cms/envs/common.py
index e09c2b51e1..55861eed44 100644
--- a/cms/envs/common.py
+++ b/cms/envs/common.py
@@ -1563,6 +1563,9 @@ YOUTUBE = {
 
 YOUTUBE_API_KEY = 'PUT_YOUR_API_KEY_HERE'
 
+# Additional languages that should be supported for video transcripts, not included in ALL_LANGUAGES
+EXTENDED_VIDEO_TRANSCRIPT_LANGUAGES = []
+
 ############################# SETTINGS FOR VIDEO UPLOAD PIPELINE #############################
 
 VIDEO_UPLOAD_PIPELINE = {