Seriously, it isn't. It's used everyday in science and health care. Many words in the English language (and many others) have roots in Latin as well. It's only because it's not used fluently in conversation anymore as a language unto itself that it's considered dead.
I agree that Latin is incredibly relevant for a lot of fields - science, medicine, linguistics. However, if Latin isn't already dead, I think the grammar in your stamp may have killed it. XD Lingua Latina non est mortua - "The Latin language is not dead." Makes, grammatically, a lot more sense.
I don't care what others call it, I like Latin. If you know Latin, you can understand many other languages fairly well, too. It's beautiful too, a graceful language.
It's only considered dead because the words aren't changing or evolving~ sure there are some root words in the English language but it's called English, not Latin so Latin hasn't evolved in years ^^
The school next door to mine teaches Latin, but mine doesn't - they only teach Spanish, French and German; the latter two are mandatory. I know some words in Latin, but only animals, like "equus".
Perhaps I should fix it.