Tell me what company you keep, and I will tell you who you are.

French: Dis-moi qui tu hantes, je te dirai qui tu es (literally: Tell me the company you keep, and I will tell you who you are)
Spanish: Dime con quien andas, diréte quien eres (literally: Tell me what company you keep, and I will tell you who you are)

Meaning: Your character reflects your chosen associates; select companions who embody your aspirations.

Origin: From 'A Dictionary of English Proverbs and Proverbial Phrases' (1870). Public domain.