Change languaje to Workpress Plugin

Good day.
I install a theme but some fields are in english (like search button) and I need it in spanish... How could I look at the code of the pages to change this particular things?

Thanks.

 

If you install a WordPress language file you won't have to rely on the theme's translations.

 

Hi.
Look, today I updated the last version of Wordpress (4.3 Billie), and also I have installed spanish language for Wordpress (my desktop is all in spanish), but somethings in the page are in english, like this...





Can you tell me what I'm doing wrong?

 

You're probably not doing anything wrong.

You'll have to ask the author of the theme how that part can be changed. It's appears to be the theme, not WordPress. If it was part of WordPress, the language file would have changed it.