Hi! Thanks for your kind words.
Unfortunately, I don't have the resources to consider localisation at this time. Hive Time grew out of a jam game, and some of our hasty decisions were made without keeping localisation in mind, so there'd be a non-trivial amount of work needed before any proper localisation efforts could begin. There are also many strings that aren't included in the json files or are assembled programmatically (eg: I have a couple of functions that modify strings to handle English rules for pluralisation), etc. that complicate things further.
The json files bundled with the game are templates for the game's (mostly undocumented) mod support. You can copy the entire json folder into ~/.local/share/hivetime (or the equivalent path if you're not on Linux - you can find those in the FAQ here on the Itch page) and the game will load those versions over the ones included in the .pck file. If you just want to modify one file, you can just make a json folder in that location and drop the file you want to modify in there.
Hope that helps!