A couple of times, but not often. My Greek is very fluent, so depending on context, I might dream in Greek (if for example I am in Greece in the dream). I have often dreamt in German too. Most of the times though the dreams do not have a particular language, at least not one that I can remember. They’re more ideas.
One night last November, my daughter was sleeping in my bed when suddenly she started shouting “moje! moje!” (which means “mine” in Polish). She’d been very possessive about stuff, and especially me, while we were in Poland. I was not allowed to play with her friend, it made her jealous.