"I speak English."
Translation:Ego Anglice loquor.
Well ... nowadays it does. :D
Keep in mind that Latin has seen extensive use even into fairly recent times (did you know that Isaac Newton's Principia Mathematica was originally written in Latin?), so nowadays there are words for things in Latin that the Ancient Romans didn't have - things like America, New York, sugar (saccharum), glasses (perspicillum); car (autocinetum); and, of course, English.
There are two other reasons for this as well. One is that some people continue to use Latin as a living language, and so having words for things that we have (even though the Ancient Romans didn't) is a bit of a must. The other is that Latin remains the official language of the Vatican, so more modern terminology is necessary for legal documents and the like. :)
You can check my (neo)Latin here: http://archives.nd.edu/words.html Enjoy! :D
Volgav vitsenanieff nivya kevach varatsach.
At the Roman times, it was aenglisc/anglic languages (not one, several ones).
English doesn't really show it now, for us, but in Romance language, as for instance in French "anglais, it really show it comes from the "angles", a German tribe, hence nationality name in Latin "Anglus".