Worse: Google went through a period of normally serving me French-language pages. I'm not in a French-speaking country. I don't have French in my accept header

Worse: Google went through a period of normally serving me French-language pages. I'm not in a French-speaking country. I don't have French in my accept header. I never expressed any preference towards the French language. But, my ISP was Orange (France Telecom) and I had a variable IP from them.