This interaction need not neccesarily be a bad thing either. Interestingly, when modern French people use English words they often put their own slant on them, which basically means they are changing them. For example, what the French call "Le People" is what we would call "celebrities". They dont quite mean the same thing. So language has developed.
Of course it can be very sad if an influx of a foreign tongue does away with custom and tradition and the "uniqueness" of a society, but I would argue that any tradition that cannot stand such competition obviously cannot mean that much to the members of that culture. Tradition is fine, IF it provides a sense of community and a link to the past. If it stops doing that though, you really have to ask if its not time it goes.
Blame it on The Boss or The Beatles. It’s Rock Music’s fault.
After all, it wasn’t Reagan that brought down the Soviet Union; it was the Beatles. >sarc