How reliably does Google determine a user's region, in order to pick the right hreflang option (specifically en-gb vs. en-nz)?
Is defining an hreflang sufficient to avoid duplicate content penalties between US and UK sites with nearly identical content?
Sitemap best practice for multilingual website - Should I list my urls in each language or is the use of rel=“alternate” + hreflang enough?
Do I need to use "hreflang" when expanding a website to a new country using a different ccTLD domain
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