YOU SAID:
hi! im someone you dont know
INTO JAPANESE
やあ!あなたが知らない誰かをim
BACK INTO ENGLISH
Hi! Im someone you don't know
INTO JAPANESE
やあ!あなたが知らない誰かのIm
BACK INTO ENGLISH
Hi! Im of someone you don't know
INTO JAPANESE
やあ!あなたが知らない誰かのイム
BACK INTO ENGLISH
Hi! Im of someone you don't know
That didn't even make that much sense in English.