“how many languages are there” is the same kind of question as “how many colours are there”. It doesn’t work like that, you can group stuff into as many or as few categories as you like.
The only real answer is probably like “at least three”, for both.
Now the next unsolved question is: when a person is multilingual, should that count as multiple languages or are they all facets of the same idiolect? Is code-switching between formal and informal English the same as code-switching between English and French? Can a person even have multiple idiolects?
“how many languages are there” is the same kind of question as “how many colours are there”. It doesn’t work like that, you can group stuff into as many or as few categories as you like.
The only real answer is probably like “at least three”, for both.
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Now the next unsolved question is: when a person is multilingual, should that count as multiple languages or are they all facets of the same idiolect? Is code-switching between formal and informal English the same as code-switching between English and French? Can a person even have multiple idiolects?