I am interested in buying the Guild Wars 2 theme. I am just wondering if there is a working English version? I was also wondering what sort of forum it has incorporated?

How easy is it to load onto my host?

The english language in the theme. The e107 has forum. Easy install the theme.
This themes to e107 system. I think from your post that you do not know the system?

No i have never heard of the system before. But i just checked with my host and they have it so it shouldnt be a problem. It looks alot like wordpress on the front end?

How much does the theme cost in Australian dollars? Im not sure how to work it out.

The look is as formed.
I do not know what the Australian dollar exchange rate, to be converted.
See the e107 wiki documentation: -link-