That's true, although typically anything with in another language is quickly and easily translated. I think a single isolated phrase or short conversation does no harm.
"That still doesn't mean you can be trusted to help us."
Variance looked at them, concerned. "Are you okay?"
"Not her, them," he said, though he wasn't paying Xarenda much attention.
Variance approached her, keeping an eye on Allera to see how they reacted. "You're doing random patrols in a controlled area that isn't yours?"
@Szeth_Pancakes