I may add a comment from a non-native English speaker (I'm Italian) living in a non-English speaking country (Germany). It is a complete mess. Most of my offering is in German only, the original language track is not consistently offered. American movies in German, and only in German, yep! Italian movies only in German, of course! In this day an age, I would expect all languages to be available when streaming movies.
The result is that I do not use it, and I continue enjoying my Blue Rays, which come with all features, extras and languages, not to mention multichannel audio and consistent picture quality.