Cam catches a summons while he's in the middle of Atriama. He's seen it before, it's fine.
"I know a few of their words."
"Words for what?"
"'Princess,' 'Smudge,' 'Henry.' 'Rusty.'"
Cam starts trying words for "Princess", starting with English.
"Yes, that's it."
"Okay, cool, that means I'll be able to talk to them, which is weird but convenient. Is there anything having a translator would be useful for?"
"I would want to talk to some other cats about that first."
"Sure. Can I meet them too?"
"Would you swear to stay here and not harm anything while I went and fetched them," he replies after a brief consideration.
"This'll take how long?"
"I'd be back well before sunset."
"...yeah, okay, I'll wait here till sunset at the latest." He makes himself a chair and produces his computer and starts looking through local written material.
The first thing he checks is in comprehensible English, at a glance.
"Do you swear it," interrupts the cat.
"Is that special somehow? I don't have a particular specialness associated with it."
"I already don't want to have to tell my Clanmates I left a talking Twoleg trespassing unescorted in ThunderClan territory, but more than that I wouldn't want to explain that I didn't even get him to swear not to go rampaging through it. It won't change the minds of cats determined not to trust you but it's better than not."
"I can swear to it but I do want to be clear this is not a stronger commitment for me than announcing my intention to take it really seriously. I swear I will wait here for you until sunset."
"That's all I was asking. It won't be quite that long," he meows, and trots off.
English mostly continues to be English (of the early 2000s variety, even), though he catches a few odd words and constructions here and there before he hears a bell jingling through the forest, somewhere off that way and low to the ground.
And what might this bell belong to?
Another cat, apparently! Cam spots her before she spots him and she startles once she does.
"Hello," she chirps back, sounding remarkably unsurprised.
"I'm Cam, what's your name?"
Now she looks surprised.
" - Princess. You can actually talk, not just imitate cat speak?"
"Yeah, it's a whole thing. Nice to meet you, Princess."
"Nice to meet you too. What are you doing just sitting in the forest?"