[Uncredited] Traditional

Traditional is appropriate.

Use the Traditional credit only for composition type credits. (RSG §2.3.1.)
For 'Folk', 'Folklore', or variations/translations, please use Folk and an ANV.
Common abbreviations for this credit are 'Trad' and 'Trad.' or any language variation thereof.

NOTE: If the writer credit is NOT a variation or translation of 'Traditional', such as DP (Domaine Publique/Public Domain). please check for an existing artist name, before using Traditional with the appropriate ANV.
Other existing placeholder names used for composing credits are for instance Unknown Artist.
Also note No Artist for use as a main artist placeholder.

For releases using 'PUBLIC DOMAIN' and variations, please put the information in the notes and/or baoi section.