How to say “Someone scratched their name into the restroom partition while we were watching the film.” in Japanese
In Japanese
映画を見てる間に、誰かがトイレの個室の仕切り板に自分の名前を刻んでた。
Eiga o miteru aida ni, dareka ga toire no koshitsu no shikirita ni jibun no namae o kizandeta.