In English: A man is known by the company he keeps. -- A person's character is judged by the type of people with whom they spend their time. Equivalent: Who keeps company with wolves, will learn to howl.
In French: Dis-moi qui tu hantes, je te dirai qui tu es. -- Tell me whom you haunt and I will tell you who you are. = A man is known by the company he keeps.
In Spanish: Dime con quién andas y te diré quién eres.