It isn't even close to almost. Maybe most of the countries on the Mediterranean, plus Portugal and debatably Belgium and Switzerland, but that's very much not most of Europe.

It seems to me that you misunderstood the meaning of almost. At least, I have never heard almost to mean 'less than half'.

They're pretending to not understand that you mean Latin was the language of catholic church, Roman state, law, medicine, mathematics and thus the script for (almost) all European alphabets.

There's genuinely a toxicity problem on Lemmy, probably ingrained in many users from years of Reddit usage. 😮‍💨🥰 but DW about it.

Technically it is not the "basis" of languages, but with contextual knowledge it's so easy to know what you really meant by that. That it's "the basis language for European civilization," perhaps. Written on heraldry, churches, buildings and artifacts all over the continent.