Display transcript translations for student in their source language.

CHANGELOG.rst

@@ -5,6 +5,8 @@ These are notable changes in edx-platform.  This is a rolling list of changes,
 in roughly chronological order, most recent first.  Add your entries at or near
 the top.  Include a label indicating the component affected.
 
+Blades: Transcript translations should be displayed in their source language (BLD-935).
+
 Blades: Create an upload modal for video transcript translations (BLD-751).
 
 Studio: Add ability to reorder Pages and hide the Wiki page. STUD-1375

common/lib/xmodule/xmodule/video_module/video_module.py

@@ -124,8 +124,9 @@ class VideoModule(VideoFields, VideoStudentViewHandlers, XModule):
             else:
                 transcript_language = sorted(self.transcripts.keys())[0]
 
+            native_languages = {lang: label for lang, label in settings.LANGUAGES if len(lang) == 2}
             languages = {
-                lang: display
+                lang: native_languages.get(lang, display)
                 for lang, display in settings.ALL_LANGUAGES
                 if lang in self.transcripts
             }

lms/djangoapps/courseware/tests/test_video_mongo.py

 # -*- coding: utf-8 -*-
 """Video xmodule tests in mongo."""
+import json
 import unittest
+from collections import OrderedDict
 from mock import patch, PropertyMock, MagicMock
 
 from django.conf import settings
@@ -53,7 +55,7 @@ class TestVideoYouTube(TestVideo):
             'transcript_download_format': 'srt',
             'transcript_download_formats_list': [{'display_name': 'SubRip (.srt) file', 'value': 'srt'}, {'display_name': 'Text (.txt) file', 'value': 'txt'}],
             'transcript_language': u'en',
-            'transcript_languages': '{"en": "English", "uk": "Ukrainian"}',
+            'transcript_languages': json.dumps(OrderedDict({"en": "English", "uk":  u"Українська"})),
             'transcript_translation_url': self.item_descriptor.xmodule_runtime.handler_url(
                 self.item_descriptor, 'transcript', 'translation'
             ).rstrip('/?'),
@@ -97,6 +99,7 @@ class TestVideoNonYouTube(TestVideo):
         }
 
         context = self.item_descriptor.render('student_view').content
+
         expected_context = {
             'ajax_url': self.item_descriptor.xmodule_runtime.ajax_url + '/save_user_state',
             'data_dir': getattr(self, 'data_dir', None),
@@ -239,7 +242,7 @@ class TestGetHtmlMethod(BaseTestXmodule):
 
             expected_context.update({
                 'transcript_download_format': None if self.item_descriptor.track and self.item_descriptor.download_track else 'srt',
-                'transcript_languages': '{"en": "English"}' if not data['transcripts'] else '{"uk": "Ukrainian"}',
+                'transcript_languages': '{"en": "English"}' if not data['transcripts'] else json.dumps({"uk": u'Українська'}),
                 'transcript_language': u'en' if not data['transcripts'] or data.get('sub') else u'uk',
                 'transcript_translation_url': self.item_descriptor.xmodule_runtime.handler_url(
                     self.item_descriptor, 'transcript', 'translation'
@@ -252,7 +255,6 @@ class TestGetHtmlMethod(BaseTestXmodule):
                 'sub': data['sub'],
                 'id': self.item_descriptor.location.html_id(),
             })
-
             self.assertEqual(
                 context,
                 self.item_descriptor.xmodule_runtime.render_template('video.html', expected_context),