Replace / Translate Text in WordPress

function multi_change_translate_text( $translated ) {
    $text       = array(
        'Old Text 1' => 'New Text 1',
        'Old Text 2' => 'New Text 2',
        'Old Text 3' => 'New Text 3',
    );
    $translated = str_ireplace( array_keys( $text ), $text, $translated );
    return $translated;
}
add_filter( 'gettext', 'multi_change_translate_text', 20 );