<link rel="alternate" href="http:///path/" hreflang="x-default">
<link rel="alternate" href="http:///path/" hreflang="en">
<link rel="alternate" href="http:///path/" hreflang="ru">
<link rel="alternate" href="http:///path/" hreflang="de">
<link rel="alternate" href="http:///path/" hreflang="pl">
<link rel="alternate" href="http:///path/" hreflang="es">
</head>
Let the googlebot find the right content.
Let your users select their right language.
That is the right way to do it.
Set a language cookie for the user if you want continuity.
This redirect crap is way overused and unnecessary IMHO.
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