Hey, thanks for open sourcing TreeSheets. I forked it[1] some time ago to add localization support (though I also reorganized the code a fair bit in preparation for some other changes I was planning). It's a very cool project, pretty easy-to-understand codebase by virtue of being very simple.

1. https://github.com/alpha123/treesheets

Thanks!

The main code base also gained localization support since your fork :)