you should be able to change the phrases now if you are logged-in in the app or from here
Translating RealWorld Paint
Hi,
After being a RealWorld paint user for years, I thought I'd make a British-English translation for the program. However, when visiting the translation page; it was clear that whoever has been translating the program, isn't British as many Americanisms remain. I cannot fix the mistakes as they are locked for editing. Any way to let me correct these?:)