Unrelated to the message of your comment, but where on earth do people learn phrases such as 'Caveat Lector'? Honestly I see things like this on Hacker News al

Unrelated to the message of your comment, but where on earth do people learn phrases such as 'Caveat Lector'? Honestly I see things like this on Hacker News all the time, some obscure (to me) latin phrase that I've never seen outside of these message boards. Is there some specific body of literature that sprinkles latin phrases in otherwise common english text?