content_translation_language_types_info_alter

content_translation_language_types_info_alter(array &$language_types)

function content_translation_language_types_info_alter(array &$language_types) {
  // Make content language negotiation configurable by removing the 'locked'
  // flag.
  $language_types[LanguageInterface::TYPE_CONTENT]['locked'] = FALSE;
  unset($language_types[LanguageInterface::TYPE_CONTENT]['fixed']);
}