I'm not sure I follow. I see a list of numerous languages, and if I select them they don't stay selected. I tried to remove one language that uses an unfamiliar writing system but that didn't work either.
Also, I'm seeing all this interface in French, despite having set Opera to English as default, with French a third choice after German.
I'm a bit confused!
Thank you! I didn't spot the interface language, and I've set it to English, so now it's all a lot easier.