In my vision, music has to be an transmitting mix of art, creativity and philosophy.
Good music is always (partly) a message. And if you really have something worthfull to tell, you don`t have to wait for commercial success or for a big fan-comunity. You have to reach the people with the content. And if you really going forward to reach this small, rare and exklusive group of persons, who are really up to understand your work, you should not mind about limitation of language.
Indeed, the hearers have to go much more deeper into the materie if they have to translate your words first. That`s, overall, my opinion to language in music. To express yourself in the best way, you have to use a language wich is completely in your mind. Further it has something to do with being faithfull to your own person and heritage (without going into a political area).