It baffles me that there are still so many services that try to 'automagically' intuit which language someone wants to have a service in, instead of just simply .. asking.
Google play is a prime culprit, for example, showing a mixture of language content on the play store. See also subtitles, dubbed content, books..
Another one - Sony's Playstation store, where if you choose a country, then the language (despite them having the assets available through their international presence) is permanently set and impossible to change.