“ya’ll” is also American English’s answer to the problem of not have a plural form of “you” (see also: “you guys” or “you all” from which ya’ll is derived).
Due to English being heavily influenced by Romance languages, but not taking its grammatical structure purely from them, we really had no single-word version of “vous” (I don’t know other romance languages aside from French).
“ya’ll” is also American English’s answer to the problem of not have a plural form of “you” (see also: “you guys” or “you all” from which ya’ll is derived).
Due to English being heavily influenced by Romance languages, but not taking its grammatical structure purely from them, we really had no single-word version of “vous” (I don’t know other romance languages aside from French).