sitemap – Is there an SEO or pagerank advantage in grouping (rel = "alternative") multilingual websites (using multiple domains) together?


I am building this website which will be multi-region / multi-language.

And for that, Google suggests the following:

https://support.google.com/webmasters/answer/182192?hl=en

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Since, my domain will have to change according to the language of the country, I will have to go there with Option 1.

A country-specific area.

Example:

  • www.name-in-english.net
  • www.name-in-deutsch.net
  • www.name-in-spanish.net
  • www.name-in-french.net

Since they all have different domains, if I don't let Google know that this is the same website, they will all be treated as unique and unique websites.

Google suggests "grouping" them using one of these 3 options:

https://support.google.com/webmasters/answer/189077

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If I do, I will use the Sitemap option.

But my question is:

What do I gain by letting Google know that all of these websites are identical, but in different languages? What will be different if I let Google think that these are unique and separate websites?

Do I need to gain SEO or pagerank by doing this?

I mean, what if I get a lot of traffic to my website in English Does it benefit my other languages ​​in other areas?