Language is not US but UK
British Flag not American.
Thanks for submitting your idea. It will be implemented in case it will get much voices. We must admit that many users got used to American flag, so British flag may confuse them a little bit.
lukman Com commented
Thanks for all your suggestions, probably we'll consider to change the English flag in next UI update. :)
Robin van der Vliet commented
I also recommend something like this:
https://commons.wikimedia.org/wiki/File:English_language.svg (image in public domain)
Because "English, United Kingdom" and "English, United States" already exist, so it makes no sense to only use the American flag.
Can be seen on many websites.