Hi, Ex_Brit1941
Welcome to the Microsoft community.
Are you saying that when you click on your avatar in Edge and enter the settings, the settings page turns into Croatian? We were unable to reproduce your issue. You can first go to Bing to check if the language of your personal account is set to English. If it is, it might be a problem caused by a recent Edge update. Try reinstalling Edge and logging into your account to see if the issue still occurs. If the problem persists, please use Edge's feedback feature to report the issue and wait for the developers to fix it.
Best regards
Tommy Jin | Microsoft Community Support Specialist