diff --git a/modules/translate.py b/modules/translate.py
index 927972a..c234bba 100755
--- a/modules/translate.py
+++ b/modules/translate.py
@@ -43,6 +43,7 @@ def tr2(bot, trigger):
 
 	-i LANG, --inlang LANG  -  specifies the assumed input language.
 	-o LANG, --outlang LANG  -  specifies the desired output language.
+	See https://cloud.google.com/translate/docs/languages for language codes.
 	"""
 	if len(trigger.args) < 2:
 		return bot.reply("Translate what?")