This will work with any language quest. Get an item for a language quest, Giant Idol, Puzzle Box, Gnoll Totem etc.
1. Examine item (Do NOT accept)
2. Hand Item to another player
3. Click to accept
4. Get item back from player
5. Rinse and repeat.
You can get the full quest done for as many people as you want with 1 item.
Then go sell it on broker