It says the page is not available in my language. Where does it infer my locale from? I have set USA as my location in my Google account and preference for en-u

It says the page is not available in my language. Where does it infer my locale from? I have set USA as my location in my Google account and preference for en-us in Firefox. Hey Google, I don't want all pages to be in my language. Show them in English, please.