So I literally had to look up what the hell is "dinnae" or rather how its pronounced bc I knew Blair was Scottish, but I've never heard a Scot say "I dinnae ken". They usually say I don't know in a scottish accent (on tv). The way it's spelt looks its supposed to be prounounced like ai and not ay and by my ear it sounds like dinny. Anyways that was just my uncultured rant and also I find Naomi's piratey accent hard to do bc it does not sound sexy. I do not like Yona and am confused why she was added into the harem since there already is a muscle mommy in the group and now there's just an orc. Fun game tho inspite of my ranting
It's basically an old Scottish dialect, not only was it influenced by English, but there contact with Old Norse from the Vikings and holdover words from ancient Irish when they settled in Scotland around the 13th Century. The "ken" from "I dinnae ken" is derived from the Old Norse "kenna", meaning "to know".
Basically Blair's use of language is meant to show how disconnected she is from the others. Rae, Cait, Naomi, and to a lesser extent, Lyriel and even Yona will speak in a "modern" dialect to show that they're all on the same wavelength about certain topics, namely magic. They might come from different worlds, but they have that commonality that if someone talks about a magic related topic, they'll be able to understand in a way. But because Blair's world is so different, her understanding of magic is non-existent that she might as well be speaking a different language at times.
As for why Yona is in the game, yes we have a muscle mommy with Naomi, but with Yona we now have a
subby muscle mommy.