I get Facebook postings in a variety of languages, and it doesn't bother me - at last count, I get regular postings in Chinese, Japanese, Korean, Polish, Czech, French, Spanish, German - simply because I have friends with a wide variety of native languages.
Google Chrome has an automatic "Do you want this page translated" mode, but I think it only works if most of the page is in a single language, because it doesn't pop up in Facebook.