I have put together a list of codes (values) which you can use for creating Hreflang header attributes for your multi-lingual or multi-regional website.
How does Baidu deal with international websites? Well, in reality, Baidu favors local websites in Mandarin Chinese and doesn’t bother with multilingual or multinational websites much. However, there are ways to tell Baidu where the intended audience for each version of your website is.
The Google Pigeon update has reinforced that global brands must rethink their global SEO strategies to be competitive among local businesses in the countries they are targeting.