In English, you is used both in the second-person singular and in the second-person plural (thou is now only used in some old proverbs and old expressions).

At the opposite, French (my native language) has a T-V distinction: *tu* is always used when addressing to only one person, but *vous* is often used when addressing to multiple people; however, sometimes, *vous* is used for only one person despite being always syntactically plural. When addressing to only one person, *vous* is reserved for strangers, or people older than oneself, or authority figures.

In my world (in the sense of a fictional universe I want to create), in the most spoken language used by therianthropes (their scientific name is *Homo pilosus*, so they are humans, just not *Homo sapiens*) (*Homo pilosus* means "hairy human"), *Di* is exclusively used in the second-person singular (even when addressing to a monarch, a president, a stranger, a deity, an elder, etc.) and *Wos* is exclusively used in the second-person plural (in their language, pronouns are always capitalised) (if you ask me, in the most spoken language used by therianthropes, the w is pronounced like the English w as in "world").

So, I wonder why would a language have a second-person pronoun system opposite to English.