I don't speak Japanese, but I believe that their pronoun system is even more complex than it is in Indo-European langauges. For example, they have different first person pronouns, depending on the gender of the speaker and the relationship of the speaker to the listener.

As fra as "thou" and "thee" go, I don't know of any miodern dialect, which still uses these pronouns. The Quakers mainatined these pronouns for a while to refer to fellow Quakers, but even they eventually dispatched with the practice.

"I think people who speak English nowadays do not use "thee" and "thou" unless they are performing Shakespeare or similar, "

I see new agers use "thou" and" thee" evey once in a while when they are trying to make something inane sound important. It's really funny.

"Is there any significance attached to the genders in those languages?"

Yes, there are rough meaning groupings. In Swahili, for example, with a few exceptions, all nouns referring to humans are in the M-Wa class. Most of the other noun classes are not so neat in their groupings, but meaning plays a role and sound plays a role.

The word "gender" in grammar originally meant noun class. Since the meaning of "gender" has been taken over by sexual gender, we usually use the word "noun class" to refer to other forms of grammatical gender.

I took Swahili, which is very representative of Bantu grammar, so I will use that as an example. Swahili has ... been a while, but around a dozen noun classes or genders. In European languages, with two or three genders, basically all you have to worry about is making adjectives agree with the noun gender. In Swahili, not only adjectives but verbs and prepositions must agree with the gender.

And every gender has its own distinct forms of singular and plural. For example, M-Wa class means that the singular form of each noun begins with the prefix m- and the plural form with wa-. Example: mtoto = child, watoto = children. Ki-Vi class: kichwa = head, vichwa = heads. Adjectives, verbs and prepositions must agree in gender (noun class) and number, by way of prefixes which are usually the same prefixes as for the nouns. This results in many sentences which are highly alliterative. Like, a sentence about a noun in Ki- class can have every word beginning with ki-.

Noun classes (in languages that have them) are partly governed by sound and partly by meaning. The historical evidence is that gender in Indo-European languages was originally sound-governed -- classes of nouns with certain ending sounds taking adjectives that agreed in sound, and only gradually did these noun classes become identified with sexual gender. In the Bantu languages, the relationship with sound as well as meaning is obvious, because whoever came up with Swahili really loved sound patterns and alliteration.

As a beginning Swahili student, it's like, why all these noun classes to make things difficult, it would be a pretty easy language without them. But it doesn't take long before the noun classes become part of the whole flavor and texture and charm and rich quirkiness of the language.

I'm just wondering if there is any other language at all whose pronoun makes no distinction.
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Lots of them, you just have to get off the indo-european root.

Lakota and it's siouxian neighbors do not make distinctions of formal/non-formal. IN fact, they do not formally encode "he/she/it" into thier langage. That is, "if there is no pronoun, assume it's "he/she/it".

is that what you are asking?

It can't be "incorrect grammar" if people use it that way regularly. In the sense implied by your use of "incorrect grammar", "correct grammar" really just refers to the style or dialect used by the upper classes. Grammar can only be "incorrect" if it's unintelligible, or atleast idiosyncratic.

What's funny is i find "thou" "you" pronous to not be out of respect, in many contexts of non-english langauges, but inforced submission, enforced (reinforced) definition of status, etc.

I find it insane that i must address a professor who i do *not* respect as "You" and not "thou" just cause that's what the language code demands.

We say it like that but it is hardly ever needed.
Nous continuons de cette façon, mais ne c'est pas souvent nécessaire.

<<Tway>> is I guess an older way of saying it. Most Metropolitan speakers say we sound old fashioned. I don't think <<twa>> is "not" spoken any where else, old french is dead, except here because our settlers came here before the French language organisation.

I am from Northern Maine, Vallée Saint-Jean. Franco-American/Acadian culture is the main culture up here.