People might be familiar with the word ergo if they know about Descartes' famous phrase "Cogito, ergo sum" and its most frequent English translation "I think, therefore I am".

Hmmm... I just figured out that Descartes would probably have written this originally in French, so my question here is, how come it is the Latin translation that became so well-known? I don't know anyone who quotes Descartes by saying "Je pense, donc je suis", or however he wrote it...