If they can actually follow through with it, that's definitely quite the accomplishment and I applaud them. However, if they're running around saying they know five languages when they only know three words of the language, that's another story... If it does work for them, I must say I'm jealous. I've tried to keep French and German going at the same time, but unfortunately I kept getting them mixed up whilst trying to learn them both at once. I had to drop French and pick up German, seeing as Canadian French isn't as useful in other countries. Learning more than one language fluently would be amazing for me, let alone five.