Lacmus is a script for Wikipedia that assists in article translation.
Complete user guide can be found here: en, ru.
gulp
builds and minifies the script to ./dist/Lacmus.js
gulp --usercript /path/to/firefox/profile/
builds the script as a userscript to /path/to/firefox/profile/gm_scripts/Lacmus/Lacmus.user.js.
You can also use
gulp watch
with or without --userscript to automatically build the script whenever any of the source files change.