This webpage has alternate versions available in Spanish 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 3,694,327 websites that are Spanish HREF LANG Customers. We know of 1,640,207 live websites using Spanish HREF LANG and an additional 2,054,120 sites that used Spanish HREF LANG historically and 827,881 websites in the United States.
Get a list of 3,694,327 websites using Spanish HREF LANG which includes location information, hosting data, contact details, 1,640,207 currently live websites and an additional 1,595,880 domains that redirect to sites in this list. 2,054,120 sites that used this technology previously and 827,881 websites in the United States currently using Spanish HREF LANG.