Do You Speak A Second Language?

This is a fun reference page if you have one Romance language under your belt and are considering another one:

https://en.wikipedia.org/wiki/Lexical_similarity

If you trust these numbers (data comes from Ethnologue/SLI International, who are problematic but probably OK with Romance languages info) JMM chose Italian wisely... it and French have the highest lexical similarity of all Romance language pairs! Well, tied with Spanish/Portuguese actually.