I'd recommend you use Translate++ and learn how to use the software for the moment, as the game_messages.csv is for CN / JP for the moment. - RegalBuster
Translator++ uses a different patching method (doesn’t use the csv) and is a hard overwrite of the game files, so you’ll have to distribute the output files yourself, apologies! We’ll let you know when we have more language slots available.
-RegalBuster