[turrican]

True, but professional pilots from all countries are expected to be fluent in Aviation English. https://en.wikipedia.org/wiki/Aviation_English

[kmoser]

Yes, but in a high-stress environment, your ability to process words--especially those not in your native language--goes down the tubes quickly. Even if you were to tune out sounds to the same degree that you tune out words, at least the sounds would still have a relatively universal meaning, e.g. loud klaxon for big problem, soft chime for minor notification.