Hi! I got your email. I'll send you a notification when localization is ready for translators. I appreciate it.
I was also able to install your .dll and it works on my end. It is really cool to see parts of the game in Spanish!
The error you mentioned is probably due to the decompiler, since I don't get any errors when I compile the game. I've heard of this problem from others who have used Dnspy to edit the game, it just isn't perfect. I'm sorry there's currently not a better way to mod the game.