YOU SAID:
I swear mom! My sister did it.
INTO JAPANESE
お母さんに誓う!私の妹はそれをしました。
BACK INTO ENGLISH
I swear to my mom! My sister did it.
INTO JAPANESE
お母さんに誓います!私の妹はそれをしました。
BACK INTO ENGLISH
I swear to my mom! My sister did it.
That didn't even make that much sense in English.