I changed (Translated) the word Forums to something else and now just about everything has been changed.  Where is the actual Language file located.  I've been looking but can't find it.  Thanks.

Customization > Languages

You can download the file for a specific language as one of the options in the dropdown on the right.

I didn't found an option to reset the language.

You may install a testinstallation and download the unchanged English language and upload it back to your current installation.

I thought maybe I could find the actual folder and file for the language. So I might have to upload an older Beta copy, then save the language file to xml, then reload the new beta, then upload the xml file.    Makes me tired just thinking about that one. But thanks.  It all helps.