Chomsky would say that all languages are superficial, part of the human genetic makeup is a verbal communication 'programme' that allows us to quickly learn natural language when we are very young whether we are in Brazil, Bermingham or Beijing. The differences are not very significant compared to the similarity of how they develop and are used easily to express thoughts and needs to others. I suppose that means comparing French and English would be like comparing a Fender guitar to a Gibson guitar, they are constructed differently giving a different sound but the principles are exactly the same.
I think its interesting that the extinction rate of languages is considered alarming, surely one common language that functions well and probably better than the ones that seperate us now is an ideal? I doubt very much a txt language is going to wipe out 'proper' language, and if it did it could only do that if it was able to communicate all the subtleties of historic languages. That would make old languages obsolete anyway.