YOU SAID:
I am an 11 year old girl in fifth grade.
INTO JAPANESE
私は小学5年生の11歳の女の子です。
BACK INTO ENGLISH
I am an 11-year-old girl in fifth grade.
INTO JAPANESE
私は5年生の11歳の女の子です。
BACK INTO ENGLISH
I am an 11-year-old girl in fifth grade.
That didn't even make that much sense in English.