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 703,284 websites that are Polish HREF LANG Customers. We know of 404,956 live websites using Polish HREF LANG and an additional 298,328 sites that used Polish HREF LANG historically and 119,400 websites in the United States.
Polish HREF LANG websites that are also using other technologies.
Get a list of 703,284 websites using Polish HREF LANG which includes location information, hosting data, contact details, 404,956 currently live websites and an additional 936,494 domains that redirect to sites in this list. 298,328 sites that used this technology previouslyand 119,400 websites in the United States currently using Polish HREF LANG.
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