<link rel="alternate" href="http://site.com/" hreflang="x-default">
<link rel="alternate" href="http://site.com/" hreflang="en">
<link rel="alternate" href="http://ru.site.com/" hreflang="ru">
<link rel="alternate" href="http://de.site.com/" hreflang="de">
<link rel="alternate" href="http://pl.site.com/" hreflang="pl">
<link rel="alternate" href="http://es.site.com/" hreflang="es">
<link rel="alternate" href="http://pt.site.com/" hreflang="pt">
<link rel="alternate" href="http://fr.site.com/" hreflang="fr">
<link rel="alternate" href="http://it.site.com/" hreflang="it">
<link rel="alternate" href="http://jp.site.com/" hreflang="ja">
<link rel="alternate" href="http://nl.site.com/" hreflang="nl">