Return JavaScript with translated strings

js_lang.php

<script type="text/javascript">

<?php

define('DEFAULT_LANGUAGE', 'en');

$lang = !empty($_REQUEST['lang']) ? $_REQUEST['lang'] : DEFAULT_LANGUAGE;
$translations = get_translations($lang);
if (!empty($translations)) {
  foreach ($translations as $key => $value) {
    print $key . ' : "' . $value . '"' . "\n";
  }

}

function get_translations($lang) {
  $result = array(
      'lbl_test' => 'Some message',
      'lbl_notest' => 'No message',
    );
    
  return $result;
}

?>

</script>