@Brogan @Russ solved, finally i did it with the Style properties -> Node/forum list -> New node title indicator because on the other way didn't worked for me.
Thank you both!! :) (y)
Thank you! I've just changed it (and saved it) but it doesn't work on the forum, it's still exactly the same
Any idea of what i'm doing wrong?? :) Thanks for your time and for helping the news, it's a great help (y)
And @Brogan ,
to take advantage of this thread, do you know if this label with the word NUEVO is an addon or can be changed from xenforo?
Thanks again!