Change WordPress user roles and capabilities › Forums › Bug Reports › Cannot create new post with restricted category and polylang enabled › Reply To: Cannot create new post with restricted category and polylang enabled
At my test I added new post without problem, but can not assign category for translation until extended list of allowed categories by the translation categories ID.
I suppose that your allowed to edit only main language category. Translation for category has own ID. Add needed ID to the list of allowed categories ID.