Change "Home" name in my page navigator

Hi.
I am using the rumput-hijau-theme, and under my header-photo there is a “page navigator”.

I am not sure what it’s called, so I have problems searching for it on the net, but with “page navigator” I mean a set of links to easily bring you back where you came from, like this:

Home >> Page >> subpage >> sub-subpage

(What’s the real name for this?) All the pages and subpages are named with the name of the pages, but my homepage is automaticly called “Home” even if the page I am using there is called something else.

How do I change this? Instead of “Home” in the page navigator, I would like it the be “Hjem”.

Here is a link to a random page on my site so you understand what i mean: link