[Victor D]

txt_whats_new : We have added %new_products_txt% since your last visit.

%new_products_txt% is actually a number of new products so you need to keep it intact translating the rest of the variable.
For example:

%new_products_txt% productos nuevos.



But 'View all' text is hardcoded in this template as I see. Please create a variable for it on your own.
I will keep this in mind working on this next version.