When players insist on using their characters' disadvantages as a means to not do something, it's the duty of the GM to grant them a "boon" to overcome those disadvantages. After all, a disadvantage that provides a player with an excuse to avoid something they actually don't want to do isn't really a disadvantage in game terms.

Just make sure you disguise the "taking away of an excuse" as a significant bonus that you're generously granting to them. It makes it really hard to complain.

Transcript

[SFX]: < squee bloop ding pating blip ding whir beep >
Anakin: What is he saying?
R2-D2: Well if you can't understand me, I guess Obi-Wan's about to kick the bucket.
GM: There's a translator droid standing right next to you.
R2-D2: Oh. Fine.
C-3PO: {Pete} What this astonishingly brilliant astromech droid is saying is that Obi-Wan has sent a message.
Anakin: Finally. I hope he has some results for us.
Padmé: Maybe he's found the Lost Orb!
[SFX]: < squee blip boop tong pating bedoop >
C-3PO: Of course it never occurred to any of you to put a skill point into Droid Language.
[SFX]: < doop boppy beep ping >
C-3PO: I don't know why I even bother sometimes.
Anakin: Isn't making random beeps your entire reason for existing?
[SFX]: < bepaboodle >