This webpage has alternate versions available in Polish via the use of the hreflang tag.
https://support.google.com/webmasters/answer/189077?hl=en
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Get access to data on 714,334 websites that are Polish HREF LANG Customers. We know of 419,652 live websites using Polish HREF LANG and an additional 294,682 sites that used Polish HREF LANG historically and 121,504 websites in the United States.
Polish HREF LANG websites that are also using other technologies.
Get a list of 714,334 websites using Polish HREF LANG which includes location information, hosting data, contact details, 419,652 currently live websites and an additional 961,243 domains that redirect to sites in this list. 294,682 sites that used this technology previouslyand 121,504 websites in the United States currently using Polish HREF LANG.
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