“Dime Con Quien Andas, Y Te Dire Quien Eres” is Spanish idiom and the word to word English translation of this idiom is "Tell me with whom you walk and I will tell you who you are". Which is a very famous English idiom: “A man is known by the company he keeps”
Tell me who you hang with and I'll tell you who you are...
It means, "Tell me with whom you walk and I will tell you who you are."