I suggest that the command:
/minecolonies help

Print in chat:
https://wiki.minecolonies.com

Or possibly the link to a specific wiki page that lists the major help options, like:
Tutorial wiki page
Commands wiki page
Discord permalink

Maybe this page could also have right at the top a big automated display of:
ONLY CURRENT VERSIONS ARE SUPPORTED
The current version for Minecraft 1.12 is: (automated name of file with curseforge link to it)
The current version for Minecraft 1.14 is: (automated name of file with curseforge link to it)
The current version for Minecraft 1.15 is: (automated name of file with curseforge link to it)

same way all other translation in minecraft works, using lang files

If the command includes text how would language translation work? Would Google translate work for an initial attempt to translate the text into other languages?

Yeah, I know that but I only know one (verbal) language so I wasn't sure the process for the other languages.

You'd put it in the en_us file, and people would then translate it at translate.minecolonies.comand we merge that back into the mod