diff --git a/lib/helpers/language_validator.ex b/lib/helpers/language_validator.ex
index 4d0a0dd..7ec19b1 100644
--- a/lib/helpers/language_validator.ex
+++ b/lib/helpers/language_validator.ex
@@ -4,6 +4,7 @@ defmodule DeeplEx.LanguageValidator do
   """
 
   @valid_source_languages [
+    :AR,
     :BG,
     :CS,
     :DA,
@@ -36,6 +37,7 @@ defmodule DeeplEx.LanguageValidator do
   ]
 
   @valid_target_languages [
+    :AR,
     :BG,
     :CS,
     :DA,