Unfortunately, I didn't save what I'd found and I can't find it now... I remember a D/deaf person writing on a forum that he/she dreams in ASL, another D/deaf said he/she dreams 'with subtitles'.
Anything to help me out? Do you dream in languages that are non-native to you? Do you realize upon waking that the grammar/pronunciation/whatever was incorrect? Do you remember those dreams?
I had a dream in German once despite my German being not that good and I think, apart from a lot of "Herr" and "Mein Gott" and "Hande hoch" (the setting was WWII-esque, oh weirdness!), it was mostly rubbish. But the dream(s) in Spanish made a lot of sense.
Oh, and I've dreamt a few times in a conlang, isn't it weird?