Add admin interface for languages

lang/admin.py

@@ -0,0 +1,10 @@
+from django.contrib import admin
+from lang.models import Language
+
+class LanguageAdmin(admin.ModelAdmin):
+    list_display = ['name', 'code']
+    search_fields = ['name', 'code']
+
+admin.site.register(Language, LanguageAdmin)
+
+