diff --git a/app/helpers/languages_helper.rb b/app/helpers/languages_helper.rb
index bbf0a97fc36..00e1e5178be 100644
--- a/app/helpers/languages_helper.rb
+++ b/app/helpers/languages_helper.rb
@@ -201,7 +201,6 @@ module LanguagesHelper
     sma: ['Southern Sami', 'Åarjelsaemien Gïele'].freeze,
     smj: ['Lule Sami', 'Julevsámegiella'].freeze,
     szl: ['Silesian', 'ślůnsko godka'].freeze,
-    tai: ['Tai', 'ภาษาไท or ภาษาไต'].freeze,
     tok: ['Toki Pona', 'toki pona'].freeze,
     zba: ['Balaibalan', 'باليبلن'].freeze,
     zgh: ['Standard Moroccan Tamazight', 'ⵜⴰⵎⴰⵣⵉⵖⵜ'].freeze,
diff --git a/config/application.rb b/config/application.rb
index 171dab11f69..d3c99baa127 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -153,7 +153,6 @@ module Mastodon
       :sv,
       :szl,
       :ta,
-      :tai,
       :te,
       :th,
       :tr,
diff --git a/config/locales/tai.yml b/config/locales/tai.yml
deleted file mode 100644
index f347ac6200d..00000000000
--- a/config/locales/tai.yml
+++ /dev/null
@@ -1,10 +0,0 @@
----
-tai:
-  errors:
-    '400': The request you submitted was invalid or malformed.
-    '403': You don't have permission to view this page.
-    '404': The page you are looking for isn't here.
-    '406': This page is not available in the requested format.
-    '410': The page you were looking for doesn't exist here anymore.
-    '429': Too many requests
-    '503': The page could not be served due to a temporary server failure.