Gert, if I got your question right, I would suggest adding in your document headers for example something like this:

<link rel="alternate" hreflang="es" href="spanish.html"> - specifies a Spanish translation
<link rel="alternate" hreflang="pt" href="portugeese.html"> - specifies a Potugeese translation
<link rel="alternate" hreflang="de" href="german.html"> - specifies a German translation
<link rel="alternate" hreflang="gr" href="greek.html"> - specifies a Greek translation

e.t.c

More about, see here: http://www.richinstyle.com/guides/essential24.html

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