For example, the word "Eesti" will often get Google-Translated to "English" rather than "Estonian".
This means that a film at my local cinema that my web browser assures me is in "English" will in fact be in Estonian. And an interview with a Russian saying that he doesn't speak Estonian gets translated so that he appears to say that he doesn't speak English.
The product designers special-cased language names, doing extra work to produce what will almost always be the wrong result.
(And what they can do to place names is often patently ridiculous. For example, "Peterburi tee" should either be left alone or maybe translated to "St Petersburg Road" but actually somehow becomes "Hertford Road". And the ZIP + City name "13415 Tallinn" becomes "thirteen thousand four hundred and fifteen Tallinn".)