Non Loqui Sed Facere
 

Can anyone translate this from the latin?

Um, not me.

But I think it's "Not (only?)...loqui... but (also?)... facere".
So I guess I'm gonna guess: "Not hard, but easy".
But that is so wrong it's crazy.

Don't say, instead do.

loqui is talk, facere is do

-> Don't just talk about it, get out and do it!

Thanks, Cliche and Fastshark
That makes sense; it's the motto of our Engineers fac soc.

where is the best online Latin dictionary?

There are a bunch of them out there, just Google it.

Unless you have a basic understanding of declensions and conjugations, a dictionary won't really help decipher the actual meaning of the sentence. Latin is odd in that its sentence structure typically is in the object-subject-verb or object-verb-subject format. Longer sentences are even more jumbled and understanding the endings of the words is critical to figuring out its meaning.

Gallia est omnes divisa in partes tres for example translates into "All (omnes) of Gaul (France...Gallia) is (est) divided (divisa) into (in) three (tres) parts (partes). A quote from Caesar's writings on Rome's war with France. The Jesuits made us memorize some passages, and this one's stuck with me.

The best online Latin dictionary can be found at www.perseus.org
It takes a bit of navigation to get to it, but it really is a good resource.

FastShark, Latin syntax is actually a lot more flexible than OSV or OVS, as conjugation and declension allows a far greater flexibility than English. Such languages (Latin, classical Greek, Russian, German) are called synthetic. Languages like French and English, which rely on word order to a far greater degree than conjugation, are called analytic.

Flauie facet.