YOU SAID:
My father in law Bo has a birthday today.
INTO JAPANESE
Bo の義理の父は、今日誕生日を持っています。
BACK INTO ENGLISH
My father-in-law's Bo has a birthday today.
INTO JAPANESE
私の父の義理のボーは、今日誕生日を持っています。
BACK INTO ENGLISH
My father-in-law of Bo has a birthday today.
INTO JAPANESE
Bo の義父は、今日誕生日を持っています。
BACK INTO ENGLISH
Bo's father has a birthday today.
INTO JAPANESE
Bo の父は、今日誕生日を持っています。
BACK INTO ENGLISH
Bo's father has a birthday today.
That didn't even make that much sense in English.