Pass content language to Yoast SEO

[grappler]

Yoast SEO has a readability analysis feature. Currently only the site language is used and not language of the content.

There is an issue on Yoast for this: https://github.com/Yoast/wordpress-seo/issues/5591

Unfortunately I don't think there is a filter that Polylang could use. This issue is to help track the progress of this issue.

[Chouby]

Reviewing all issues related to Yoast SEO.

@grappler Have you some news on your side? As far as I remember we just needed a filter on Yoast side to fix this issue. For some reason I ignore https://github.com/Yoast/wordpress-seo/issues/5591 has been moved to a repository I don't have access to.

[grappler]

I also do not have access to to ticket anymore. I have tried asking someone from Yoast if they know more but have not heard back yet.

[grappler]

This is the reply that I got from Yoast Support:

We can confirm the relevant bug report has been moved to our internal issue management repository.

What's next?
Our product team will assess the severity of this problem in relation to other open bug reports and new features. Based on their assessment, the bug report will be given a priority. Our developers work on the highest priority issues first. Unfortunately, this means we cannot give you an estimate when they'll start working on your report.

If you have any further information that may affect the prioritization or help our development team solve this bug, please feel invited to reply to this email.

As soon as our development team has a clear indication in which release this problem will be solved, we'll send you an email to inform you.