routing.yml

taxonomylink:
    path: '/{taxonomytype}/{slug}'
    defaults:
        _controller: 'Bolt\Controllers\Frontend::taxonomy'
    requirements:
        taxonomytype: 'Bolt\Controllers\Routing::getAnyTaxonomyTypeRequirement'

taxonomy.yml

regions:
    name: 'Sub Regions'
    slug: regions
    singular_name: region
    singular_slug: region
    behaves_like: categories
    multiple: true
    options: [ nord, etc ]
    listing_records: 1000
    listing_template: regioncategories.twig