Category:ISO 15924:Dupl

This category lists languages which use the Duployan shorthand, Duployan stenography script (or sténographie Duployé in French), coded Dupl or 755 in ISO 15924 since 2014-11-15 [typology: notational; main direction: ltr], supported by Unicode since version 7.0 with the alias Duployan (ref. : Ch21.6). See also Wikipedia:en:ISO 15924:Dupl, Wikidata:Q5316025.
You can render that script on your system with the following fonts (in order of coverage): 'Noto Sans Duployan', sans-serif.