Everything outside the admin should be phrased that will allow different languages. So instead of using a different language you could have the text read whatever you wanted. The inputs at the top of the edit page would still need to represent the same thing as there used for other parts of the mod. However, further down the page, almost forty of the custom fields are separate an can be customized towards any product you'd want. (
Fields in this example). Then that might make the signature template screwy cause it only supports the variables I added. The only thing you'd have to live with is the php file names. So for what I think you want to do the answer is yes it should be possible to use this for things other than cars.