diff --git a/Steam/Readme.md b/Steam/Readme.md
index 6ff0830..e98f40d 100644
--- a/Steam/Readme.md
+++ b/Steam/Readme.md
@@ -3,4 +3,40 @@
 ## RichPresence.txt
 This file is provided to Steam via Steamworks and used to create rich presence strings that show up in Steam for Resonite.
 
-While this file, resembles JSON, it is not actually JSON so please be careful, PRs are welcome!
\ No newline at end of file
+While this file, resembles JSON, it is not actually JSON so please be careful, PRs are welcome!
+
+Valid languages are:
+English
+German
+French
+Italian
+Korean
+Spanish - Spain
+Simplified Chinese
+Traditional Chinese
+Russian
+Thai
+Japanese
+Portuguese - Portugal
+Polish
+Danish
+Dutch
+Finnish
+Norwegian
+Swedish
+Hungarian
+Czech
+Romanian
+Turkish
+Arabic
+Portuguese - Brazil
+Bulgarian
+Greek
+Ukrainian
+Spanish - Latin America
+Vietnamese
+Indonesian
+
+The language name is usually lowercased in the text file, but we can check for your after you PR the strings.
+
+see: https://partner.steamgames.com/doc/features/enhancedrichpresence#4 for more info.