Using lang="en-US" is wrong if your language isn't English. TapSuccess.com

Using lang="en-US" is wrong if your website language isn't English.
Here are the two-letter Language codes:
en.wikipedia.o...
Here are the two-letter Country codes:
en.wikipedia.o...
The WordPress plug-in is "Per Post Language" by Fahad Alduraibi:
wordpress.com/...
Examples:
If your website is for all Vietnamese speakers, use lang="vi"
If your website is for all Vietnamese speakers in Vietnam, use lang="vi-VN"
If your website is for all Spanish speakers in the USA, use lang="es-US"
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