This webpage has alternate versions available in Vietnamese 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 271,921 websites that are Vietnamese HREF LANG Customers. We know of 154,058 live websites using Vietnamese HREF LANG and an additional 117,863 sites that used Vietnamese HREF LANG historically and 74,812 websites in the United States.
Get a list of 271,921 websites using Vietnamese HREF LANG which includes location information, hosting data, contact details, 154,058 currently live websites and an additional 279,439 domains that redirect to sites in this list. 117,863 sites that used this technology previously and 74,812 websites in the United States currently using Vietnamese HREF LANG.
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