Translator Plugin Pro Translating Even Admin Pages: Bug or Feature?

Today I received an email from our QA engineer. Translator Plugin Pro 4.0 (WordPress plugin to automatically translate your blog to 10 or more languages) is translating even WordPress admin pages correctly. Is this a bug or a feature? Let’s consider the use cases.
A common use case would be registered users choosing to view the blog in their language of choice. In such case it is conceivable that they would also love to see that the admin pages (available to them) are also translated similarly.

On the other end of the spectrum it is a cheap way to get WordPress in your own language without having to create .mo files.

I couldn’t see any incorrect use of this feature; can you?