Thanks for your response.
I readed the FAQs, but not find answer for my problem, probably this is very simple.
According with your great information.
I have this configuration
joomla 1.5.22
CB 1.4
Language Espanol
I was install the plugin spanish, all is good except the alert messages. the registration form have messages in spanish and english, for example:
I add a print screen with the error.
I need all warning messages in spanish.
Thanks for your help