We solved it, as some of you indicated, with two separate blogs for the two different languages that we post in.
But, we have one additional issue. The language of the document, <html lang=“en”>, is set for all blogs at once (because they’re hosted on the same domain). That is not helping us SEO-wise…
So for us it is an absolute must to be able to set the language on the blog-level, which sets the html language.