Have you looked through the selections here:
-Languages-voices-speedcams&order=descParticularly this one for languages:
Primo-1.1-various-language-files-for-contentAs far as a 'tutorial' for how to change the program language, it's quite simple:
1) Copy desired language ({language}.zip --
do not unzip the language file itself) file(s) to
{Main Primo 1.1 folder}\content\lang\2) Start Primo and change the Program Language within Settings.
Spoken voices for directions are similar (find files for download, copy desired {voice}.zip files to
{Primo Folder}\content\voice\, change spoken voice in Sound Settings) but it depends if you want/can have TTS voices or 'Natural" (Non-TTS) voices.