are you talking about formatting?

here are some examples of ways ive seen it done:

outright using a different language

“Hi,” Bob said.

“Skfofhe fjen qpsk,” Ana replied.

Bob squinted. “Sorry, what was that?”

adding a translation

“Hi,” Bob said.

“Akfjgn rjfn.” Hello.

“Huh?”

replacing dialogue with the translation

“Hi,” Bob said.

“Greetings,” Ana replied.

Bob couldn’t understand, she was speaking in a different language. “Huh?”

replacing dialogue with description

“Hi,” Bob said.

Ana replied with something incomprehensible but friendly.

“I’m gonna assume you said hi back.”