YOU SAID:
i have eighteen different parents
INTO JAPANESE
私は18人の異なる親がいます
BACK INTO ENGLISH
I have 18 different parents
INTO JAPANESE
私は18人の親がいます
BACK INTO ENGLISH
I have 18 parents
INTO JAPANESE
私は18人の両親がいます
BACK INTO ENGLISH
I have 18 parents
You've done this before, haven't you.