Re: lying on your CV
Well you can put it on your resume, as long as you say that you don't know it fluently, or that you have taken such and such classes. So then at least you do get "credit" for knowing something, but no one expects you to know the subject in depth.
Besides, to speak spanish here in florida, you only really need to know poqito. The rest the natives can communicate to you with body language, and english. So it also depends on the job and if you need to know the language for the job.
No on is going to converse with me in Latin, because its a dead language. But they might ask me about grammar rules, etc. Which I remember very little of.