How does gender(animate and inanimate) evolve typically, And I saw your video on vowel quality changes but I didn't quite see how certain diphthongs could change overtime, specifically:ai,ei,oi,əi,au,eu, and əu. Thank you so much if you can help me with these!
Usually animate vs. inanimate isn't marked in the way, say, masculine and feminine is (most of the time) in Spanish. Rather, animate and inanimate nouns are treated differently, and those differences end up getting codified.
As a sidetrack, consider mass and count nouns in English. These are definite noun classes of English that you have to understand to use the language well, but they're not marked, and generally not taught. The differences, though, are pronounced:
I'll have a hot dog. 🙂
I'll have hot dog. 😬
I'll have a rice. 😬
I'll have rice. 🙂
You can certainly invent contexts where the 😬 ones work, but they usually involve either (a) jokes, or (b) turning the noun into an opposite type via zero derivation. For example, imagine you're being served at a counter of improbable ice cream flavors, and after surveying them all (typewriter, Nintendo Wii Nunchuck buttons, forgetfulness, fig) you decide you want hot dog flavored ice cream, and so you ask for hot dog [flavored ice cream]. Now imagine a series of keychains with pictures of foods on them, and after looking at them all, you decide you want a rice [keychain]. In other words, the way to make the 😬 ones work is to take a naturally count noun and treat it like a mass noun and vice-versa.
The same logic that applies here applies to the development of animacy, but usually with different parameters. For example, inanimate nouns are more likely to be objects and less likely to be subjects. One very common phenomenon you'll see in language is the following (btw, @staff, if we could add tables to Tumblr, I would be so, so, so very happy):
Animate Subject: Noun
Animate Object: Modified Noun
Inanimate Subject: Noun
Inanimate Object Noun
The reason is the animate noun occurring as an object is a bit of a surprise, but is also common enough that it needs to be demarcated or set apart in some way. An inanimate noun is much less likely to be a subject so language users don't care enough to make an event of it.
But look at that! Suddenly there's an animacy distinction in the language. It's pretty minor, but it can keep going. For example, as in Dothraki, sometimes only animate nouns are allowed an explicit plural. Inanimate nouns aren't conisdered important enough to distinguish. That is, it doesn't matter how much rice, how many rocks, how many shirts there are (if it is, there's numbers), but it is important to know how many sisters, how many cats, how many grandparents, etc. there are without having to ask.
Now imagine that being applied to the above system with subjects and objects treated differently depending on animacy. Suddenly animate and inanimate nouns look very different.
And you can keep going in this fashion. Eventually you'll have some full on noun classes that need to be taught explicitly.














