this tool
https://falkooxc.pythonanywhere.com/static/translate.htmlcan edit language file
its a by product of something else i played around with but i made something usable out of it
you upload a ruleset you want to translate/edit
you find all existing languages in columns and all strings in the rows
fill out missing parts or if you want add a new language rightclick on a column and add a new column
after editing you can export a single language (click on the header "export column") or export all languages as one file (=upper left corner)
usage:
you can use CTRL+return to make new lines these newlines will be replaced by space in the export
you can resize the columns but cant get smaller then the biggest cell needs
Edit:
fixed a small bug