Alien planets should have appropriately alien sounding names, when named by aliens. Which in this case is a little bit weird, since I'm pretty sure no Wookiee in existence can pronounce the name of their home planet.

Transcript

Luke: Okay, whatever. Yoda, we have a quest. We need you to come back to Endor—
GM: You're interrupted by the arrival of a furry alien.
GM: Ben, with Chewbacca off on Kashyyyk, can you play this NPC for me? Here's a description.
C-3PO: It's pronounced Kashee-yik.
GM: You said it had three "y"s.
C-3PO: Only the outer two are vowels. The middle one is a consonant. Why else would there be three of them?
GM: All right, with Chewbacca off on Kashee-yik—
Fozzie: {played by Ben} Hey! Did you hear the one about the strongest alien in the Galaxy, the tallest alien in the Galaxy, and the furriest alien in the Galaxy walking into a bar?
Luke: What?
Fozzie: Wookiee wookiee wookiee!