2019-10-15 UTC
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[tonz] yeah, it could be page wide. But it’s based on adding a language marker to the <html> tag. Wordpress treats it as a sidewide preference, not a page wide one, unless you use the WP Multilingual plugins (which assumes you want to present the same content/taxonomies in different languages, and doesn’t assume different content in different languages, nor does it countenance the possibility of having mixed language content in the same spot )