Goa'uld Dictionary
Does anyone else want Stargate to bring out a Goa'uld Dictionary/Phrase Book like Star Trek did with the Klingon Dictionary? I would! Several months ago, I did find a website with a guide to the Goa'uld language, but I can't remember it!
As for making it up as they go along, they probably do. But I have noticed that they have used/altered a lot of words several times throughout the series. Here are some examples:
Kree: Come here, attention, do this, yoo-hoo!
Tek'Ma'Tek: I thought this meant Master, because Teal'c keeps saying it to Bra'Tac. But "The Warrior" says that it's a greeting and also has an altered version: Tek'Ma'Te.
Kal'Shak: Another greeting.
Kel: A question. As in "Kel Amonet?", as spoken by Apophis. This means "Where is Amonet?"
Kel'Nok'Shree: An exclamation. Spoken by the Tok'Ra in "Into The Fire". She said, "Kel'Nok'Shree Jaffa!" Meaning, "I am not Jaffa!"