Thanks for the link, Decimus. Perhaps people could look at the list and each choose a few favorites. So far, being of Spanish heritage, I'll say this one is my favorite:
Beati hispani, quibus vivere bibere est. "Happy are the Spaniards, for whom to live is to drink."
Unfortunately, this is a bit of a sarcastic observation, since it stems from the fact that when many Spaniards pronounce Latin, as when we speak Spanish, there is no distinction between the sounds of "b" an"v."
By the bye, the French also favor us with a charming expression:
Tu parles français comme une vache espagnole; that is, "You speak French like a Spanish cow," referring to the difficulty many Spaniards have in pronouncing French, which is phonemically very different from Spanish. In fact, I wouldn't be surprised if it was a Frenchman who coined the Latin aphorism I chose! Speaking of which, have you ever heard the French pronunciation of Latin?
French people are always surprised when I tell them of my Spanish origins, because they find it remarkable that I, being a person whose first language was Spanish, have almost no accent in speaking French; of course, this is because I learned it quite young, while my phonemic habits were still "flexible."