Let us not underestimate the significance of language. Aboriginal people were punished on missions for speaking (their) “language”5 because those bent on destroying their people-hood intuitively understood the power of language. “Language has a unique ability to prevent assimilation. A special language allows a nation to stand apart and see themselves as outside the larger society6”.
(For a more Halachic/Legalistic scholarly view, see blog post of Rabbi Aharon Lichtenstein's view, http://kolharav.blogspot.com/2010/12/rabbi-aharon-lichtensteins-response-to.html )