<link rel="alternate" hreflang="en" href="en.domain.com"/>

<link rel="alternate" hreflang="de" href="de.domain.com"/>

<link rel="alternate" hreflang="fr" href="fr.domain.com"/>

<link rel="alternate" hreflang="it" href="it.domain.com"/>

<link rel="alternate" hreflang="es" href="es.domain.com"/>