@elger
That request is a tad OT in this speedcam thread. But i'm in a good mood, you're old like me and my replying to you may even vaguely annoy Schermann (just kidding, i think)...
Connect your unit via WebUpdater, it will offer you compatible voices; or
Go over to [Only registered and activated users can see links. ] or
Try this one: [Only registered and activated users can see links. ]. You have a Nuvi 310? It should suit it i think.