Getting started translating RKWard
The primary ressource for RKWard translations is https://l10n.kde.org/. A lot of documenation, and contact info for your language team is available, there.
Note that the translation files are divided into the strings for the (core) application, and several separate catalogs for plugins and help pages. For translating the latter, refer to https://rkward.kde.org/doc/rkwardplugins/i18n.html.
Testing your translation
To test your translation, copy the .po file you created/modified to the “i18n”-subdirectory of your rkward sources. Then do cmake, make, make install as detailed in the INSTALL instructions.
Use Settings->Switch Application Language to switch between languages. On most systems you can also use environment variables to change the language of rkward, i.e:
(where xx would be your language code, e.g. fr).
On some systems it appears to be necessary to specify both KDE_LANG and LC_ALL. E.g.
LC_ALL=de_DE.utf-8 KDE_LANG=de rkward
Developers: Maintainance of translations
Synchronize translations from KDE l10n to git like this: