To state the obvious, Europe has far-left as well. And no they are not the ruling parties - who enable healthcare, kindergartens, pensions and other measures sometimes mistakenly referred as "far left".
Maybe "Americanaly". Lots of words there seem to mean different things than in the rest of the english speaking world.
Oh don't worry it's not just an American thing: social democrats get called “far left” on French TV on a regular basis too…
I'm not up to date on French politics, but is this just a fascimile of the American playbook? In Australia at least, the parallels are pretty obvious and easily tracked back to Americanism.