Here is a perfectly ordinary red district in Anitam. Nelen parks his truck at the recharge station, and the next driver takes the handoff, and Nelen stretches out the kinks in his back and heads home.
"Not unless someone I've met is reading it to me. I can only magically gain understanding by borrowing it from a specific person; I can't pull it out of thin air."
"Ah, I see. I should be able to learn the language much faster than normal by borrowing your understanding in conversation, or any other volunteer's, like we're doing right now; but that won't help me if the instructions are very complicated. I don't mind staying here for a while, though, if you don't mind having me here and if having me here won't cause trouble."
"Your neighbourhood has been very hospitable to me so far and I wouldn't like to cause you any trouble."
"There are ingredients I could use to make myself heal faster by magic... pure distilled water is probably the easiest to come by. I can also use similar magic to heal other people but I don't know whether magical healing is a service you'd find useful, and the traces would linger much longer than the traces of the magic I'm using now. Potentially permanently, depending on the method."
"As far as I'm aware, only magic can detect this type of magical trace," he confirms. "I think your technology is ahead of ours in a number of ways, but the technology I'm used to has tried several ways to analyze magic without directly using magic and failed at nearly all of them."
"...hmm. And you're—likely to be troubled—by the rest of the colours?"
"I see. And you're concerned that... if I leave the neighbourhood and teach magic outside it, someone might later find out that I healed some of you, and they'd trouble you about it?"