Answer for question on StackOverflow: http://stackoverflow.com/questions/39983925/php-oop-echo-ing-a-single-variable-from-within-a-class/39983994#39983994

example.php

<?php

class Language {

    public $language = '';

    public $phrases = array(
        'UK' => array(
            'hello' => 'Ello gov\'na ',
            'goodbye' => 'Good day!'
        ),
        'AUS' => array(
            'hello' => 'Alight mate? ',
            'goodbye' => 'See ya later, mate'
        )
    );

    public function __construct($language = 'UK')
    {
        $this->language = $language;
    }

    public function say($phrase_key = 'hello')
    {
            return $this->phrases[$this->language][$phrase_key];
    }

}

$language = new Language('AUS');

echo $language->say('goodbye');
// See ya later, mate