?

I think they've been communicating in English the whole time and wen they have sex obviously our cute uke here switches to a language hes comfortable with unconsciously. So yh nihongo is Japanese in Japanese it was probd translated like that coz they were speaking English idk

Idk what other person explained but nihongo means Japanese in Japanese lol as japan is nihon, for example Espana is spanish in Spanish ( I hope u get what I mean), they used nihongo once and then used word Japanese instead