I've had various dreams like this! (and I study french too...)
In the latest one i dreamt that a friend of mine (she's italian) was speaking to me in either italian or spanish. She said the following words:
Somnivera (which in the dream meant sleep)
Parco essarcio (which meant stomach)

I dreamt I checked the words in a dictionary and they meant just what I thought they did.
In real life I could only find one of the words, Parco, in italian and spanish and it meant "moderate" and "park".

Languages really don't matter in dreams. Usually, i understand what people say in dreams even if I've never heard anything like it before.

I'm not sure what your dream could have meant, maybe you somehow put two known words together and formed your own? I know that sometimes happens for me anyway.