XF 1.5 Adding hreflang tags with Multiple langues

[Fred.]

I would like to add the hreflang tag to my forum pages.
Most content is in Dutch, however our linkdirectory is in English.
I have a Dutch translation (default) but also have the English as an option.

What will be the best approach for this?

Is it bad to add this on all pages?

<link rel="alternate" href="https://example.com" hreflang="x-default" />

How do I seperate and specify the Dutch from the English?

Thanks!

 

[Fred.]

So no one is using this?
It's recommended by Google.

All tips are welcome.

 

[Bombardier]

where do I add the hreflang tags and can somebody give me an idea what tag to use for english US

 

[Fred.]

Google is now ignoring the HTML lang attribute and recommends us to use hreflang markup. Time for a update!
https://www.seroundtable.com/google-ignores-the-html-lang-attribute-22974.html

 

[MstrfBlng]

I want to use this