Binary mui resources of WPS Office For Linux
If you want to modify your own translation, go wps_i18n
Download the language package you need, ru_RU for example.
Extract to WPS Office mui directory, typically in /opt/kingsoft/wps-office/office6/.
Now start the WPS Office, Writer for example, open a new tab (or a document, what a bad design!!!), click the "Switch Language" button where place in right top side. Choose the language you just extracted. :)
Use wps-office-mui AUR package.