Submission history view not internationalized.

LMS-2167

lms/djangoapps/courseware/views.py

@@ -2,6 +2,7 @@ import logging
 import urllib
 
 from collections import defaultdict
+from django.utils.translation import ugettext as _
 
 from django.conf import settings
 from django.core.context_processors import csrf
@@ -721,9 +722,12 @@ def submission_history(request, course_id, student_username, location):
             student_id=student.id
         )
     except User.DoesNotExist:
-        return HttpResponse(escape("User {0} does not exist.".format(student_username)))
+        return HttpResponse(escape(_(u'User {username} does not exist.').format(username=student_username)))
     except StudentModule.DoesNotExist:
-        return HttpResponse(escape("{0} has never accessed problem {1}".format(student_username, location)))
+        return HttpResponse(escape(_(u'User {username} has never accessed problem {location}').format(
+            username=student_username,
+            location=location
+        )))
 
     history_entries = StudentModuleHistory.objects.filter(
         student_module=student_module