YOU SAID:

my girlfriend should let me go to sleep

INTO JAPANESE

私のガールフレンドは私に眠らせてください

BACK INTO ENGLISH

Let my girlfriend sleep me

INTO JAPANESE

彼女に眠らせて

BACK INTO ENGLISH

Let her sleep

INTO JAPANESE

寝かせてやれ

BACK INTO ENGLISH

Let her sleep.

INTO JAPANESE

寝かせてやれ

BACK INTO ENGLISH

Let her sleep.