...he guesses it would be harder to climb mountains if you hadn't been born yet but it seems like a strange thing to say when someone is contesting your mountain climbing ability.

It also doesn't look like a very hard mountain. Maybe because a Melkorish sort made it it has hidden difficulties.

How long can you, uh, stay split up?

"Like a few hours. I'm actually gonna have to in like twenty minutes but I'll do it here so you aren't stranded."

Here seems like an all right place to be stuck but that's very kind of you.

"You have to go around to a different part of the mountain to get the, like, tourist rest stops, I dunno what you'd eat."

...plants? And possibly animals when we got bored of plants. Does your world have animals?

"Yeah, but..."

I guess if they sometimes turn into people it'd be very dangerous to hunt them.

"Nnnnnno."

I don't just mean because you could accidentally kill a person, osanwë would prevent that, I mean maybe the ones who turn into people care about the ones that haven't and are hoping they'll turn into people soon.

"Extra double no?"

...okay? We won't eat animals if it's important.

"No, we eat animals, it's just... I dunno. Do you know enough English yet that you could not read Bella's mind if she came here, I dunno how fast you learn stuff since you're aliens."

I haven't really been focusing on learning the language but I could try to focus on that. It would still probably take longer than an hour. I could still not listen to her thoughts, or she could learn how to only send the ones she wants to send.

"Oh, you can do that?"

Everybody does that. Otherwise it would be awkward if you wanted to make someone a present or something.

"I... guess? Uh, how do you do it?"

You differentiate the things you want to send and the things you want to not-send. It usually takes a lot of practice to do consistently. Most people have some kind of sensory or spatial metaphor - indoors/outdoors, written versus spoken...

...Alli repeats this to Bella. "Bella says she needs more details."

What kinds of details?

"Kinda details - uh - which is which in those metaphors or doesn't it matter, how much practice, what happens if you get it wrong?"

If you get it wrong I guess maybe you have things public which you meant to be private? It's about how you conceptualize it but 'written thoughts are private, spoken thoughts are public' would be a much more ordinary way of conceptualizing it than the other way around, or 'indoor thoughts are private, outdoor thoughts are public'. We teach it to children and children are slower to learn things but it usually takes months, I think. 

"Wow, if she can't be around you for months that's gonna be a pain in the neck. Since she's the one who teleports and this is, uh. ...Africa."

Oh, staying here for a couple of months while everyone learns how to do private thoughts would be no problem.

"I still think you are confused about plants. Unless one of you does turning random plants into food."

Plants are food, you don't have to turn them into it. You can turn them into tastier food, I suppose. What do you mean 'does'?