In 4 years the domestic PRC will have the largest traffic flow of all global regions. If they had been forced to use English phraseologies, surely some problems would appear now and then just because of that and the overall safety levels at the busiest world's busiest theatre would reduce.
That is part of what the linguist SLF gentleman had been saying. For all those who failed to understand his message or learn the meaning of it despite waving the flag of professionally utilizing those two very skills.
There are 6 official ICAO languages but that is not the point since the language of international aviation really is English.
Every country is allowed to use their own language and this cannot be disrespected. What happens at CDG and other French airports is select few of the local pilots insist on speaking their own at the detriment of the whole team.
When the CDG ATC tried to mandate English it's the French pilot unions who stood up against the order. Imagine that, a worker's union protecting the individual's legal right against unlawful rulings. Can't have the whole pie and eat it, dears.
All this talk of the French in use completely throws the focus off centre.
Unacceptable performance by a bottom paying operator by pilots without proper work contracts flying unsuspecting Western public.
Dysfunctional ATC reacation to low altitude alert.
Substandard Airport equipment in marginal weather. Which is not only safety issue but an economic too. Everybody pays good money to them to be ready for arriving aircraft.
I don't read too many threads on PPRuNe about Binter speaking Spanish at Fuerteventura, the odd Dash 8 doing the same at Madrid. Italian at Palermo, Greek at Santorini, Russian at Moscow.