gistfile1.txt

diff --git a/pontoon/teams/views.py b/pontoon/teams/views.py
index 647d95a..c74d83e 100644
--- a/pontoon/teams/views.py
+++ b/pontoon/teams/views.py
@@ -122,12 +122,9 @@ def ajax_permissions(request, locale):
     translators = l.translators_group.user_set.exclude(pk__in=managers).all()
     all_users = User.objects.exclude(pk__in=managers).exclude(pk__in=translators).exclude(email='')
 
-    contributors = (
-        User.translators
-        .filter(translation__locale=l)
-        .values_list('email', flat=True)
-        .distinct()
-    )
+    contributors_qs = User.translators.with_translation_counts(None, Q(locale=l))
+    contributors = set([contributor.email for contributor in contributors_qs])
+
     locale_projects = l.projects_permissions
     return render(request, 'teams/includes/permissions.html', {
         'locale': l,