As others mentioned, different languages have different typography rules. Our toolset is English-based and making it generic for any language would be extremely difficult and time consuming. Additionally, all of us read in (at least) English, and at least I can't credibly say I'm a grammar/typography expert in any other language.

In the past people have expressed interest in forking the toolset for other languages, which is totally fine. But I don't think I've seen any of those attempts come to fruition yet.