Plugin Author
Chouby
(@chouby)
Hello,
Thank you for your review. The language of the admin bar is indeed not managed by Polylang. We don’t do that because it would be rather expensive to load translations in 2 languages instead of one.
Indeed, when you load a page in a non en-US language, the time to load the page is increased by approximately 30% compared to en-US. It’s not directly related to Polylang but due to the way WordPress handles the translations. You would obtain the same result with a fresh non en-US WP install.
Since WP 4.7, it’s however rather easy to do with a few lines of PHP. You don’t even need Polylang. See https://github.com/polylang/polylang/issues/201#issuecomment-348178243