I would like the following sentiment to be translated into Latin. (You
have some latitude on word choice and order as long as the meaning
remains the same--I prefer something short and poetic sounding.)

"Just because you say it in a dead language doesn't make it true."

I want to use this whenever someone tries to whip out a pithy little
quotation in Latin on me. (I'm going for "cleverly ironic.")

Hi, alwayscurious! 

My tame Latin expert has created this little verse:

"Veritas non facta
etiam si haec dicta
in lingua mortua."

(Literally, 
"Truth is not made
even if these things are said
in a dead language."

Have fun with it!

Good job. Thanks for your help.

Nice job angry!

Here's my version of it:
"per modo in linguis exanimis dicitur veritam non facit."

Literally, "just because it is being said in a dead language does not
make it the truth."

It's been awhile since I've done any translating though, so who knows
how accurate it really is. (I took 4 years of Latin in High School,
but that was 3 years ago.)

alwayscurious, let us know what the people say when you use it on them! ;-)