Mailing List Language Error

Hi lads

Have tried to register a mail adreess in the mailing list via front end and when I dont chose any field of the list and send the mail , I got an ATTENTION (error) showing this:


I have tried to create a new language variable (Spanish) with this variable: _warning_subscr_need_list

but no luck…

Does someone know where should I correct this? It looks clearly that variable is missing but… where it goes?

P:D:using CS-CART 20.5, Spanish language