Simple translator script, easy to embed. [PHP]

translator.php

<?php 
if (!defined("translator_loaded")) {
 $lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
 $acceptLang = ['en','ru']; 

$user_pref_langs = explode(',', $_SERVER['HTTP_ACCEPT_LANGUAGE']);
foreach($user_pref_langs as $idx => $llang) {
    $llang = substr($llang, 0, 2);
    if (in_array($llang, $acceptLang)) {
        $lang=$llang;
        break;
    }
}
 $lang = in_array($lang, $acceptLang) ? $lang : 'en';
 $packet= json_decode(file_get_contents(".".$lang),true);
 foreach ($packet as $key => $value) {
 	if (!defined($key)){
 	$key = str_replace(".", "_",$key);
 	define($key, $value);
 	}
 }

 function e($var){
 	$var = str_replace(".", "_",$var);
 	echo constant($var);
 }
 define("translator_loaded",true);
}
?>

1. Download this file
2. Include it in your something.php
3. Replace words with
4. Create .en file
5. Add this: {"some.keywords.that.can.be.split.by.dots":"Some translational JSON-Escaped words "especially for quotes""}
6. Done, add languages and the same file with it's 2-letter code(.ru, .de, .fr)