Oct 17
24
Google responded to a webmaster asking if they can use ISO 3166-2 for their hreflang files saying you should probably stick with ISO 3166-1. Google’s documentation specifically says they support ISO 3166-1 and makes no mention of ISO 3166-2…
Read the rest here:
Google: Stick With ISO 3166-1 For Hreflang, Not 3166-2