Superfish responsive multilevel dropdown menu

Superfish responsive multilevel dropdown menu

Hi,  i am working in a web site that has a superfish responsive menu, everything is working just fine, but when the menu turns on dropdown for movile versions.  There is a text line "Please choose a page", like a title of the dropdown arrow, an that line is in english, so i need to translate it to spanish "Seleccione una sección" but i can't find where.  It seems this line is wroten nowhere, can you help me please????


Thanks