You are limited to the place names you can use, so they can be easily translated. I think they are aware of this, and waiting for some names to come naturally from the players. The NAV is really outdated

If you just play locally against bots you can drop this NAV in your maps folder. It's current and has the place names according to Brute's csgo tuscan posted a few years ago: https://gs.tehwebz.net/csgo/navs/de_tuscan.nav