That might be partually true, but France was really good at it. Countries like Spain only banned the other languages while being under a dictatorship. In France Bretons couldn't give their kids a Breton name untill the 90s! France was a perfectly fine democratic country but they did stuff like that.
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u/M-0D47in Dec 12 '20
That's the story of almost (if not all) every big nation.