diff --git a/src/pretix/_base_settings.py b/src/pretix/_base_settings.py
index 96121867a..50d248386 100644
--- a/src/pretix/_base_settings.py
+++ b/src/pretix/_base_settings.py
@@ -118,6 +118,7 @@ ALL_LANGUAGES = [
     ('sv', _('Swedish')),
     ('es', _('Spanish')),
     ('es-419', _('Spanish (Latin America)')),
+    ('th', _('Thai')),
     ('tr', _('Turkish')),
     ('uk', _('Ukrainian')),
 ]