Hi, these strings are displayed in the WDTVExt Plugins option, I added them to my po file:
#~ msgid "Reload Plugins"
#~ msgid "Update Plugins"
#~ msgid "Download Plugins"
#~ msgid "Available Plugins"
#~ msgid "Rescan Plugins"
Please add them to the template file.
There are other strings in the plugins menu that could not be translated. Simply adding them to the file did not work.