Yep, this. As a Flemish Belgian (Dutch is my first language) it's a bit annoying that Netflix in general doesn't publish anything in Belgium if there are not at least Dutch or French subtitles available. It's a good thing the original audio tracks are almost always available, but just how limited the selection is just because of their subtitle requirement is sad.
The younger generation here really doesn't mind watching originally English content in English, with English subtitles (or just no subtitles at all). Even content that isn't originally English, I'd be fine having audio in the original language and English subtitles. But Netflix won't do that.
If they loosened their language restrictions a bit I am sure I would get sooooo much more content...