> What options do we have in Python world if someone wants to migrate CMS based sites built using WordPress ?
It is more of an equivalent to Drupal than WP in terms of scope, but Plone[0] has been used on a lot of sites, and has ticked all of the boxes mentioned (i18n, a11y, etc.) for a very long time. The underlying Zope web application framework isn't particularly popular these days, but is a solid (if somewhat idiosyncratic) foundation. At 22 years old, you could call Zope the emacs of Python web frameworks.
There are also a variety of CMSs based on Django or Flask, but I'm less familiar with those.
Wagtail - https://wagtail.io - is the most popular Python CMS. It runs sites for NASA, Google, Mozilla, NHS.uk. It's open source and under very active development.
It is more of an equivalent to Drupal than WP in terms of scope, but Plone[0] has been used on a lot of sites, and has ticked all of the boxes mentioned (i18n, a11y, etc.) for a very long time. The underlying Zope web application framework isn't particularly popular these days, but is a solid (if somewhat idiosyncratic) foundation. At 22 years old, you could call Zope the emacs of Python web frameworks.
There are also a variety of CMSs based on Django or Flask, but I'm less familiar with those.
[0] https://plone.org/