Modify the “Search” in the secondary menu

Hi,

I have several questions but will post them in different threads to make future searches easier.

Regarding the secondary menu bar of the theme, with the “about”, “contact” and “search” options which use in the top right corner of my homepage. I have translated the former ones to Hebrew, but where can I modify the “Search” to be presented in Hebrew?

Thanks

The page I need help with: [log in to see the link]