Add i18n to strings

lms/djangoapps/certificates/models.py

@@ -268,7 +268,8 @@ class CertificateGenerationHistory(TimeStampedModel):
         """
         Return "regenerated" if record corresponds to Certificate Regeneration task, otherwise returns 'generated'
         """
-        return "regenerated" if self.is_regeneration else "generated"
+        # Translators: This is a past-tense verb that is used for task action messages.
+        return _("regenerated") if self.is_regeneration else _("generated")
 
     def get_certificate_generation_candidates(self):
         """
@@ -285,7 +286,8 @@ class CertificateGenerationHistory(TimeStampedModel):
             task_input_json = json.loads(task_input)
         except ValueError:
             # if task input is empty, it means certificates were generated for all learners
-            return "All learners"
+            # Translators: This string represents task was executed for all learners.
+            return _("All learners")
 
         # get statuses_to_regenerate from task_input convert statuses to human readable strings and return
         statuses = task_input_json.get('statuses_to_regenerate', None)
@@ -296,7 +298,8 @@ class CertificateGenerationHistory(TimeStampedModel):
 
         # If students is present in task_input then, certificate generation task was run to
         # generate certificates for white listed students otherwise it is for all students.
-        return "For exceptions" if 'students' in task_input_json else "All learners"
+        # Translators: This string represents task was executed for students having exceptions.
+        return _("For exceptions") if 'students' in task_input_json else _("All learners")
 
     class Meta(object):
         app_label = "certificates"