She responds in the same language.  "Yes, it's Barbliic."   Which was one of the popular Archipeligan ones Cam started working on machine translation for.  "If you wanted to call another one of me that might be an easier way of doing simultaneous interpretation?"

- The unstylish teenager looks really excitedly at Felicity when she exits the shuttle!  Specifically at her arms and their fourness!

Cam will get another Felicity on the horn, sure.

"Hello, so far we've just confirmed we both speak this and I'm explaining the relevant parts of the interpretation setup."  (The nearby one is indeed explaining something).  "What would you like to say?"

"...hello, what brings you here, do you want to keep being here and do you have the ability to leave on your own?"

Felicity relays: "I could use a ride!  I was feeling lucky so I went glidering out here, and I thought my luck had run out when my hot-air balloon caught on fire but now I see that it hasn't!  I'm Isaac, what are your names?"

"End quote - does your universe have luck; reports seem kind of conflicted about that - "

"My universe has no specific phenomenon that is luck, it just describes situations where unpredictable events go in a favorable direction, especially a few times in a row."

"Oh I see.  Ours mostly doesn't noticeably have it, but apparently if you have enough of your lucky items at once it can have a more substantial effect?  Right now he's just saying 'and this is my lucky' whatever - "

Isaac is indicating his incredibly mismatched articles of clothing and miscellaneous objects one at a time.  " - And these are four of my luckiest shoelaces; two in the shoes one as the shorts drawstring and this one - "  He gestures to one wrapped several times around his ankle on the outside of the jeans.  "And the jeans are just because it's cold and I don't have any lucky long pants.  I've been working on finding out what all my lucky objects were since I was eleven - or really four, but I didn't get serious about keeping track of it till I was eleven - so I really thought the flying part would go better but I still met you and probably am not gonna die alone out here anymore so I'm pretty happy with how it's going."

"How long have you been stuck here, do you need water or food or anything?"

"Since this afternoon.  I'm doing fine."

"Wow, our timing really is lucky. Anyway, I'm Cam and this is Felicity and we're checking out the habitability of these caverns."

"Cool!!"

"Yeah! Apart from the flaming balloon wreckage how would you rate the habitability of this cave?"

"It's kind of - " he's interrupted by some coughing.  "It was kind of cold farther in."  He extracts a hard plastic water bottle covered in clashing stickers from a well-used duffle bag and takes a long drink from it.

Cam rains gently on the flaming balloon wreckage. "How cold?"

- Isaac stares at the rain and doesn't respond.

"- I can create arbitrary material objects and am thinking of colonizing a cave of this kind."

(Felicity pauses very slightly before relaying that.)

"Really?  Can I be part of it?  Why can you do that?"

"The species of person I am can! I don't have a clear sense of what sort of colonist filtration I will be doing yet."

"You're a different species??"

"Yup, I'm a demon."

"What are you doing all the way up here?"

"- up here?"