Determine if web page text is English

I would you like to enhance my code, to determine if the web site text is english or not. My code is attached. The lines with ??? need to be fixed. [login to view URL] is chinese, I want that page skipped, but it has no charset or lang tag. How can I detect its language? ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Employer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the employer on the site per the worker's Worker Legal Agreement). ## Platform php on [login to view URL]