farm-2.x-dev/modules/core/l10n/farm_l10n.routing.yml

farm_l10n.settings:
  path: '/farm/settings/language'
  defaults:
    _form: '\Drupal\farm_l10n\Form\L10nSettingsForm'
    _title: 'Language settings'
  requirements:
    _permission: 'administer farm language'