I agree that many an incident is the result of a combination of adverse factors. And often new procedures/rules/SOP's are adopted (and I'm not just talking knee-jerk reactions) to prevent future occurences. If one link in the chain was broken, the outcome may have been very different. Why maintain the language link at all?
As controllers AND pilots alike are indicating here and in previous threads, it is the feeling of many that a standardised "language" is adopted. Situational awareness of ALL parties who can hear and understand all ATC instructions and responses is THE BIG PICTURE.
This thread has (thankfully) gone beyond the smattering of xenophobia that started rearing it's ugly head. Saftey and "national pride" should be mutually exclusive.