This is used to categorize missing specific epithets as Latin or Translingual.
The first parameter is the specific epithet. The second is the language code.
A language code other than Latin or Translingual will place the entry in a category that is probably non-existent or neglected. Therefore, if the language code is not "la" or "mul", you should add the item to the requested entries page for the language involved. (See WT:RE.)