Hey, so I gave a talk at Queerness and Games Conf this weekend on making your own programming language, and it's up on the #QGCon Twitch page!
The talk went over the power dynamics of making your own language, why small-scale languages can be useful in game dev, and there's a demo of making a simple language interpreter (embedded in a JavaScript game).
You can see the slides and the code from the demo here: https://mcclure.github.io/qgcon-2018/
You can watch the talk here:
https://www.twitch.tv/videos/316750486?t=05m35s