It is possible to make changes if some translations are missing or miss spelled at LaunchPad:
https://translations.launchpad.net/rocrail/rocrail-dev/+pots/rocrail
 
To test a translation from LaunchPad download the *.po file and open it with the "Open translation…" menu item.
Make sure the loaded translation language  ist the same as the active language in Rocview to make it visible.
The loaded translation remains only visible for the current Rocview session.