Popsu-coloque/web/core/modules/language/language.links.task.yml

entity.configurable_language.collection:
  title: 'List'
  route_name: entity.configurable_language.collection
  base_route: entity.configurable_language.collection
language.negotiation:
  title: 'Detection and selection'
  route_name: language.negotiation
  base_route: entity.configurable_language.collection

entity.configurable_language.edit_form:
  title: 'Edit'
  route_name: entity.configurable_language.edit_form
  base_route: entity.configurable_language.edit_form