I do have an idea when it comes to learning a new language. It stated that are hearing with in our ears is not completely shut down while we sleep. There are video's out there on Youtube for your desire language, that usually range from an hour to 5 hour sessions. Try falling asleep to this with head phones or ear buds and become lucid, you should be able to hear the video with in the dream environment.

Learning while lucid is much easier surprisingly. Practice and memorize the word while you are dreaming and when you wake up it should feel like solid knowledge. I always like to think of it as downloading. You can do this with other things besides language as well.