<html lang="fr"> [...] </html>
This is fine.This French web page has an English blog post. This is OK, HTML supports that. Just put a "lang="en"' attribute in the 'article' tag and the spec is happy, spell-check works, screen readers interpret things properly, ...
This is, however, not done currently: <article class="page centered-block limit-width">Currently, blog posts are never translated at all, so fixing this should just be a matter of unconditionally adding 'lang="en"' to all <article ...>.
Greetings, Maxime.
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