All right babes. It's my turn to come in
How would the yandere chain feel about a reader speaking a lot of hylian. But they mix it up. Like when you speak a lot of languages and sometimes you mix them up. Like putting english words into Spanish on accident?
That but with hylian.
They'd be more threatened than anything. The fact that reader is able to speak to many different species across Hyrule is worrying. You could be plotting against them or asking for help from a passerby, and they wouldn't understand you. That's why they don't trust you to translate for them. They would rather starve, be harmed, or die than allow you to escape them. That's how precious you are to them.
They get jealous when you converse with other races. It stems from their insecurity and possessiveness. They have banned Wild from leading them to his Hyrule. You are much too friendly with the Zora. Sidon is much too nice to you! He likes to hold your hand, hug you, and swim with you. It's unacceptable. The only reason Sidon wasn't killed by one of the Links is because Wild defended him. Wild never defends anyone The Chain wants to kill because he's so hungry for your attention. So they let him live, for now.
In just everyday situations, they find it a lot more adorable. They'll just give you this starry-eyed look and nod along. You could have been ranting in Zora the entire time, and none of them will correct you. It's like the unspoken rule that if someone falls asleep on you, then you shouldn't move. If you slip into another language, they just go along with it. When you realize you apologize but they insist there's no need for that. As long as you aren't hiding secrets while speaking in a different tongue, they don't quite care what language you speak in.
They'll fight for your attention under the guise of wanting to learn to speak a new dialect. Some of them know bits and pieces of the languages of the different races, and others know only Hylian. So it's most definitely something they bicker over. You have to create a schedule so they can each take a turn learning something about one of those languages.
They all just find it so fascinating. They love it. It's just one of your unique quirks. It's something that makes you, you. And they love all of you, every part—no matter how big or small.