How to change the text on Theme options. Lots of grammar errors

I would like to use the Social theme as the default theme people can use to sign up for a mutli-user site. When I go to the Theme Options page, it has a lot of different options, like the Site layout settings, Font CSS, etc. This page has a lot of grammar errors on it....like:
Choose your Site dropdown navigation background hover color
*this will changed the dropdown and subpage background hover color

OR

If you want to used other video like vimeo, google video or any (not youtube) for the intro header, insert your video embed code here *html allowed

The "changed" and "used" in these sentences should be change and use.

Where do I go to change the text on this page? I am using this for an education situation, so having a bunch of grammar mistakes is not going to be too good!

Thanks