How can PHP Echo function be replaced with a more efficient method in language file integration?

Using PHP's `echo` function to output language strings in a file integration can be replaced with a more efficient method by using PHP's `include` or `require` functions to directly include the language file. This way, the language strings can be accessed directly without the need for additional output functions.

// Include the language file
require_once 'language_file.php';

// Access the language strings directly
echo $lang['hello_message'];