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Same in Spanish ('usted' and 'tu', respectively).

And in most Indian languages.

And French, "tu" (familiar singular) and "vous" (formal singular, or plural).

English used to have "thou", but of course that's long since extinct.

Trivia, "thou" was actually the informal pronoun.

On the other hand in Mexican Spanish, "usted" is fading away. It's curious how different cultures get rid of different options.

"Usted" is alive and well in Argentinian Spanish. Divided by a common language indeed...

In Italian is almost like that: "tu" (familiar) and "voi" (very formal) or "lei" (less formal)

And Russian.

And Czech. And Dutch

And Afrikaans: jy (familiar), u (ever so formal), but u is (or seems to be) falling out of common use.

And in Turkish. "Sen" ve "Siz".

And Spanish, "Tu" vs "Usted" vs "Vos"

Hindi has three - tu, tum and aap. I explained some of this on my Hindi lessons site - http://hindipedia.com/hindi-video-lesson-04-pronouns.

The problem with the German version is that "Sie" also means "she" and "they". Usted at least does not mean "she."

So, are you talking about your sister… or are you talking to your superior? (My 2nd most hated thing about German.)

Italian also has "Lei" which means both she and you (in the formal sense).