Thats a brillant idea, with hard working mods and Admins, we could have a simular thing to wikipedia happening right here... its some work but its an excellent idea.
We could have each Arabic word mentioned within the forum linking back to its meaning so all one can do is click on it. I reckon the Admins should also standartdise the transliteration so that when somebody types in Allah it automatically changes to Allāh with the line above the a, and then a hyperlink leading to the meaning. This can be all done via the control panel.
using the same method you would replace a swear word with *$%^£" or somewhat simular. I really hope that automatic word linking can be done. It would be a good idea to see how wikipedia have done it, because they probaly did not do it manually but automatically, so when people type in the word that is already regeistered in the database it will automatically display a hyperlink.
DO NOT SLEEP ON THIS IDEA