YOU SAID:

My sister burps really loudly and doesn't care who hears it unless it's one of our grandparents.

INTO JAPANESE

私の妹は本当に大声でげっぷをし、祖父母でない限り誰がそれを聞くかを気にしません。

BACK INTO ENGLISH

My sister really burps loud and doesn't care who hears it unless he's a grandparent.

INTO JAPANESE

私の妹は本当に大きなげっぷをし、祖父母でない限り誰がそれを聞くかを気にしません。

BACK INTO ENGLISH

My sister has a really big burp and doesn't care who hears it unless he's a grandparent.

INTO JAPANESE

私の妹は大きなげっぷを持っており、祖父母でない限り誰がそれを聞くかは気にしません。

BACK INTO ENGLISH

My sister has a big burp and does not care who hears it unless he is a grandparent.

INTO JAPANESE

私の妹は大きなげっぷを持っていて、彼が祖父母でない限り誰がそれを聞くか気にしません。

BACK INTO ENGLISH

My sister has a big burp and does not care who hears it unless he is a grandparent.