Hello!

anyone knows where to find a translation in Catalan (ca_ES)?

Very thanks!

All known translations are here: http://www.zenphoto.org/trac/report/9
Catalan has not been maintained as you can see.

I had already seen... Thanks!

Feel free to take over that ticket if you like. But will be quite a bit of work. Best read the translation tutorial before considering that.

but where is the previous translation in Catalan? why is not downloadable in the web?

Quite simple: The ticket owner did not even start it.