Hand-wobble gesture.

How about this progression.  Or this one?

That one gets a tentative nod.

Arillegua does a take playing the chords and melody to record internally on the keyboard.  "What's it about?"

"I don't know."

"Huh, really?  Or do you mean you don't know enough Forjañol to say."

"I mean I do not even remember the song's name."

"...Hm.  Do you think people where you're from might not like music as much as we do?"

"...I think I don't like music as much as someone whose job is music!"

"There are a lot of people whose jobs aren't music, who still buy music!  I'd think a normal person would know enough popular songs to start with one they knew a name for, in a - in an event - like yours, and I don't know if I only think that because my job is music, or because our worlds are different, or if you like music less than most people from your world, or if you're just stressed from being in a new world and not doing your best."

"I know the names of other songs. I just wanted to hum that one because it was in my head."

"Okay!  Sorry."

"Also some music doesn't even have real titles and is called the person's name and a number. Like Beethoven's Fifth." She can hum some of that.

This one Arillegua fails to come up with chords for quite as solidly, but she can get a draft (and the melody on its own) recorded in the keyboard for now, if Bella has other songs in mind.  Or perhaps she'd rather just hum a bunch of melodies into a mic to be picked apart later?

She seems to be in a humming melodies place right now, yeah. She's writing to herself in her foreign language and absentmindedly producing tunes.

If she looks autonomous enough Arillegua is going to go take a shower.

No protests here.

Half an hour later she pads back into the suite's main room, hair wrapped in a towel and body wrapped in a monogrammed plush robe.  "It's getting pretty late here.  Are you tired?"

"A little. I should sleep when people here sleep."

"Do you have any favored rest aids?  Ones you like?"

"I... don't know what that means."

"Uh, the things that are in drinks, or sometimes pills or food, that help you calm down or sleep?"

"No, I don't like that."

"Sure.  You look about my size, do you want to borrow pajamas?"

"Yes thank you."