So I assume the tool has been made to fit I guess Hydrus' format for category names and that's cool, however personally I run a local instance of danbooru in my own LAN.
When I use your lovely tool to copy tags from other places to import them into my own booru's tag editor what I am doing right now I run a PowerShell script to manipulate my clipboard and replace the tag category names with the ones that danbooru uses.
Maybe a little option would help so boorutagparser would allow me to use danbooru-style category names? This should also go a long way towards helping fill public boorus' info as a contributor where another booru might have tags and you just add the ones that are missing or something. (like yandere.re to danbooru or vice versa)