Porque no está en español al 100% ser un sueño hecho realidad
Hi,
All translaltions are done by people who volunteered to do it and they are doing it in their spare time as a hobby, free of charge - it takes time and effort to translate almost 3k lines of text (more are being constantly added), also dev didn't share the whole script that can be found in the game yet, his main priority is to develop the game, localization is his least concern as he didn't really plan on doing it, the community wanted different languages in the game.
As long as he game is still a WIP and in early stages, don't expect every line and every word being translated. Dev will surely see to it, once the development will be nearing the end, but that might be in a year or even more.
Cheers