It's one of those project names that only makes sense if you know that the creator goes by the name 'thatonecalculator', 'calc' for short and it's their fork of 'misskey' - boom, it's calckey.
But for anyone else and general adoption it really doesn't suit it. I think I'd have to come up with new names for some of my personal projects too if I ever released them since the naming scheme is similar... like 'dowathbin' 'dowathstodon'