How to fix "no access to installed language"

Getting the "The ea account does not have access to the installed language Please reinstall the game in an allowed language or log in with a different account"
Have done everything the forums say (reinstall, repair, change timezone etc) but this still don't launch. This is the 3rd time this has happened to me with this game over the nearly decade since it launched. Changed my online location to the US as it says it is US English on installer but still no joy.

Last time EA actually had support for this and a guy from the team went into my account and fixed it. However now EA is limiting its contact with us plebs to get the problem resolved. If anyone can tell me something that has not been mentioned on the forums before to fix this I would be most grateful