YOU SAID:
i slept with a french mother
INTO JAPANESE
私はフランス人の母親と一緒に寝ました
BACK INTO ENGLISH
I slept with my French mother
INTO JAPANESE
フランス人の母と寝ました
BACK INTO ENGLISH
Slept with a french mother
INTO JAPANESE
フランス人の母親と一緒に寝た
BACK INTO ENGLISH
I slept with my French mother
INTO JAPANESE
フランス人の母と寝ました
BACK INTO ENGLISH
Slept with a french mother
INTO JAPANESE
フランス人の母親と一緒に寝た
it is unlikely that this phrase will ever reach equilibrium