YOU SAID:

Hi you what are you doing here

INTO JAPANESE

こんにちはあなたはここで何をしているの

BACK INTO ENGLISH

Hello What are you doing here

INTO JAPANESE

やぁ　ここで何してる？

BACK INTO ENGLISH

Hello. What are you doing here?

INTO JAPANESE

やぁ　ここで何してる？

BACK INTO ENGLISH

Hello. What are you doing here?