[FIX] opencart - Add the previously deleted english language

If you have previously deleted (in general not suggested) the English language supposing to solve the problem to have just one language in the backend you can try to add it again.

Run this sql query to add with ID 1.

INSERT INTO `oc_language` (`language_id`, `name`, `code`, `locale`, `image`, `directory`, `sort_order`, `status`) VALUES
(1, 'English', 'en', 'en_US.UTF-8,en_US,en-gb,english', 'gb.png', 'english', 1, 1);