Too many thanks that you have post it,
It was a fault inside the config_numbers.lua, inside the Spanish .zip voice file
So please download from the modified voice for Spanish and moreover please change the Spanish
lang that you have in your device with this new of this download:
[Only registered and activated users can see links. Click Here To Register...]
I haven't tested on road but I think it will be fine.
Bytheway, if you are intesting to translate 2 small pages from English to Spansih then sent to me PM in order to fix
together the announcement of Driver Alerts in dimka Skin.