Just talk.
We'll handle the language.
Press Start and talk normally. The other person's language is recognised from their first words, and each of you hears the other in your own language.
US$0.12 a minute · counted in 15-second steps, only while connected
The conversation appears here: what each of you said, and its translation.
Let the other person know you're using live translation. Audio goes to OpenAI to translate it and isn't saved by Playtrail. Up to 10 minutes at a time, charged in 15-second steps while connected: Standard US$0.12 a minute, Live US$0.20 a minute.