To be honest, my favorite language is my own language Tentacode [0], closely followed by my recent experimental language Gar [1]. Tenta is not publicly released yet, but the source can be downloaded on github [2]. I've been experimenting with making games in a bunch of languages to inform the design of Tenta by seeing how much I can strip away and still successfully, efficiently make a meaningful game.
[0] https://tentacode.org/docs/language/basic_types/