Mystile template ( translation of search products box)

Hello guys,

I have had problems to translate the Search Products box (the message inside of the box), on the top bar next to checkout button. How could I do that? Does anyone know where this file is located to make manual changes in the code?

(PS I’ve already used poedit to translate the theme and got the translation of the WooCommerce plugin and everything is nicely translated except the search products box). I also checked if there was translations to be made regarding this term, but there wasn’t)

Does anyone know how to solve this problem?

Thanks in advance,