What I have indicated to you is what you must do.

As "speedcams" we mean the 32 categories that can be alerted in the Nextgen, the categories 1-3-4-5-8-15-31 are the only ones that correspond to the Spanish categories that you found.

They can be done all 32 categories using the Spanish categories, but you have to edit the speedcam.zip file, the lang.zip file and the voice.zip file.........

The solution I have indicated to you is the simplest and easiest.