Here's a breakdown:
* Where: This is an English word.
* Are you: This is also English.
* Yar: This is a Hindi word meaning "friend" or "dude." It's used casually like "bro" or "man."
While the phrase uses the Hindi word "yar," the overall structure and word order are English. A more grammatically correct way to say this in Hindi would be:
* Tum kahaan ho yar? (तुम कहाँ हो यार?)
This translates directly to "You where are friend?"