Speaking your native tongue and the language you are most familiar with in your native country reduces safety? That is a novel concept. Recall the terrible American Airlines accident in Cali....The Tower controller was questioning the approach that the AAL flight and the responses that the pilots were saying, but there was a language barrier outside of the standard phraseology to verbalize those questions. In the Cali case, English was the lowest common denominator....in the case of Air France operations inside France, it is not.
Your claim that this and unspecified other items "make AF the least safe airline in the whole of JAR land - and indeed much less safe than a number of '3rd world' airlines" Care to back up that claim with objective hard facts?