code: protected function getTranslatableAttributesFromSchema()
      {
          if ((!$con = $this->getConnection()) || (!$builder = $con->getSchemaBuilder())) {
              return [];
          }
  
          if ($columns = TranslatableConfig::cacheGet($this->getI18nTable())) {
              return $columns;
          }
  
          $columns = $builder->getColumnListing($this->getI18nTable());
          unset($columns[array_search($this->getForeignKey(), $columns)]);
  
          TranslatableConfig::cacheSet($this->getI18nTable(), $columns);
  
          return $columns;
      }
docs: Get an array of translatable attributes from schema.
  
  @return array