Go to:

https://guix.gnu.org/en/blog/2023/parameterized-packages-for-gnu-guix/

then click on the link ‘Parameterized Packages for GNU Guix’ in the 
breadcrumbs ‘Home -> Blog -> Parameterized Packages for GNU Guix’.

This goes to

https://guix.gnu.org/blog/2023/parameterized-packages-for-gnu-guix

which is a 404 Not Found.

The same issue holds for non-English translations as well.
Other blog posts are affected as well.

Best regards
Maxime Devos