Ask HN: Best practices for a bilingual blog?

I was wondering if anybody has any feedback about running a bilingual blog.

I'm a freelance developper, so when I write technical posts, I do it in english to reach as many people as possible.

But I also write articles with random thoughts, short stories, etc. and I do it in french because this is my native language.

What are the best practices in that case? Should I split my blog into two separate domains? Does it really matter? What do you think?