Regarding Jas and Vincent: I just extracted their vanilla dialogue XNBs and read through it and I don't agree that your mod follows their style at all. Your sentences are up to 3x longer than the vanilla "kids" style, and use more complex and awkward sentence structures, while the vanilla sentences are super short and basic. And even little details stand out, like how vanilla Vincent dialogue never really says the player's name anywhere and at most uses "Hi there, mister! / Hi there, miss!" (without any player name), while you write out a weirdly capitalized "Look, Mister @! / Look, Miss @! / Have you met the man who lives in a tent, Mister @? / Have you met the man who lives in a tent, Miss @?" in yours (which is a greeting he never uses in vanilla, and even the capitalization is wrong, as is the fact that you're making a kid end a sentence with an awkwardly inserted "Mister Jacob" out of nowhere, which almost makes it sound like it's Mister Jacob who is "the man who lives in the tent, Mister Jacob"), or how vanilla Jas uses "..." to begin/end almost every sentence in vanilla, while you don't use that anywhere.

There are also lots of really awkward sentences for the kids, such as "Guess what! Yesterday Sam took me to the bus stop!" which would flow more naturally as "Guess what! Sam took me to the bus stop yesterday!", or at the very least putting a grammatical comma between "Yesterday" and "Sam", like "Guess what! Yesterday, Sam took me to the bus stop!"... And then there's all the long and clunky sentences, such as "Look, Mister Jacob! I got to keep a souvenir when Sam was working on that big rock pile by the lake!" which isn't how any kid let alone any human speaks (try speaking that sentence out loud and feel the tongue-twisting, droning awkwardness that would bore any real kid), which could be simplified to something more flowing and more boyish and child-like, such as "Look at this! Sam found a cool rock and gave it to me. He was playing with a big rock by the water!".

There's also some really weird sentences, like when Vincent says that he was "hanging out" with Linus: "I was hanging out with him because Sam said the bridge was too dangerous", which just draws attention to the weird concept of Vincent and Linus "hanging out" alone together (something we never see in-game since Vincent is basically glued to a leash by Penny), and is also a weird choice of words for a little boy. He wouldn't say that he was "hanging out". That whole sentence doesn't fit the game at all

Most of the kid's sentences feel awkward in various ways. Take this Jas sentence for example: "Vincent and I made a house for snails for you."... That's such a weird sentence structure, and would flow more naturally as "Vincent and I made a snail house for you."

It's also super weird that every Vincent line is about all the cool things he did after every repaired project, but 3 of the 5 Jas lines after each project is about how "Vincent did that cool thing with XYZ, but Shane refused to let me go with them" and Jas being sad instead of happy after each construction project... And Vincent is happy that he's gonna go see a movie when the cinema is complete, while Jas just sadly wonders if she will get to see a movie too. Wtf.

A lot of little things like that all add up to ultimately making your Jas/Vincent writings feel both a bit awkward and not fitting with the vanilla style. For starters, I would remove the "@" (player name) from most of Vincent's dialogue, and remove the weird capitalization of Mister/Miss, and add "..." everywhere to Jas' dialogue lines, to get closer to vanilla even if the sentences are still longer and more complex. You could also use ChatGPT and ask it to re-write the sentences how kids would speak naturally. But overall, Jas and Vincent are two pretty inconsequential characters that I barely even bother talking to, so it doesn't truly matter. I would rate those kid character dialogues as "awkward but not the worst in the world". And the other writings are great since you weren't constrained by trying to make "kid language" for the other characters!

Overall you did a fantastic job with the writing. I am sure you've spent days writing and working on the phrasing of all the new dialogue lines, so I understand the work that went into it, and I greatly appreciate that you've shared the mod with the world. It's awesome to finally see the villagers react to Joja's greatness. I've endorsed it, to help its search rankings. :)