Fixed imports

weblate/trans/management/commands/cleanuptrans.py

@@ -20,7 +20,7 @@
 
 from django.core.management.base import BaseCommand
 from weblate.trans.models import Suggestion, Comment, Check, Unit, Project
-from lang.models import Language
+from weblate.lang.models import Language
 
 
 class Command(BaseCommand):

weblate/trans/management/commands/rebuild_index.py

@@ -19,7 +19,7 @@
 #
 
 from weblate.trans.management.commands import WeblateCommand
-from lang.models import Language
+from weblate.lang.models import Language
 from weblate.trans.search import (
     update_index, create_source_index, create_target_index
 )