> Romance languages [...] evolved in the past due to the influence of "Vulgar Latin."
Minor correction: they are derived, not influenced by Vulgar Latin.
That's why so many words are different from Classical Latin, but similar between Romance languages. Like how Latin for house is "domus", but Romance languages use casa/casă/chez because common people referred to their house by the word "casa".
Slavic is somewhat more conservative and still has a bunch of archaic proto-Slavic and even proto-Indo-European stuff in it. Even most of the basic swearwords are still readily recognizable from PIE, which I always found particularly amusing:
Minor correction: they are derived, not influenced by Vulgar Latin.
That's why so many words are different from Classical Latin, but similar between Romance languages. Like how Latin for house is "domus", but Romance languages use casa/casă/chez because common people referred to their house by the word "casa".