I've run into situations w/ Google from time to time where some page or ad or something defaults my language to something else, like Russian, and it'll stick around on other sites sometimes until I clear my histoy and cookies.
I stopped using Chrome for a variety of reasons, not the least of which is that it seems to allow through more ad and tracking garbage than it should. Switched back to Firefox and haven't run into the language problem since, and using 64-bit builds (initially Waterfox, now Lawlietfox), it's actually been faster, too.