I’ve found reverse culture shock to be much bigger than culture shock in itself, at least when dealing with Japan.

Many people make two posts, one in each language. I’ve never seen anyone complain about it, and it looks much neater. Sometimes having two languages on one page looks really messy.

And when it’s your own content, you can definitely use it as you want. If readers don’t like it, they will let you know, either by not voting, by downvoting, or by leaving you comments.