diff --git a/local/languages/de.ini b/local/languages/de.ini
index 1e8dd43c44aa3b43bacccb6804bc9f23070a75c6..f77ccadb8f7290632050e9f92ec18200bd735d65 100644
--- a/local/languages/de.ini
+++ b/local/languages/de.ini
@@ -164,6 +164,23 @@ Tactile Media = "Taktiles Medium"
 Unknown Format = "unbekanntes Format"
 Video = Video
 
+; refs #14912 supplement - adds detected missing format_facet
+BookPart = Buchkapitel
+ElectronicArticle = E-Article
+ElectronicBook = E-Book
+ElectronicBookPart = E-Book-Kapitel
+ElectronicIntegratingResource = Elektronische Ressource im Fernzugriff
+ElectronicMap = Karte online
+ElectronicMusicalScore = Elektronische Noten
+ElectronicNotatedMusic = Elektronische Noten
+ElectronicProceeding = E-Proceedings
+ElectronicResourceRemoteAccess = Elektronische Ressource im Fernzugriff
+ElectronicSoundRecordingMedium = Tonaufnahme online
+ElectronicThesis = Elektronische Hochschulschrift
+ElectronicVideo = Video
+MusicalScore = Noten
+VideoTape = Videodatenträger
+
 ###
 AND = UND
 APA Citation = "APA Zitierstil"
diff --git a/local/languages/en.ini b/local/languages/en.ini
index dde13342f86a4ca73fed3664819091014e2638c3..90c73bd7b9d6c37aba4a1ee6e643e07c675c8a92 100644
--- a/local/languages/en.ini
+++ b/local/languages/en.ini
@@ -170,6 +170,23 @@ Tactile Media = Tactile Media
 Unknown Format = Unknown Format
 Video = Video
 
+; refs #14912 supplement - adds detected missing format
+BookPart = Chapter
+ElectronicArticle = E-Article
+ElectronicBook = E-Book
+ElectronicBookPart = E-Chapter
+ElectronicIntegratingResource = Electronic Resource
+ElectronicMap = Electronic Map
+ElectronicMusicalScore = Electronic Musical Score
+ElectronicNotatedMusic = Electronic Notated Music
+ElectronicProceeding = Electronic Proceeding
+ElectronicResourceRemoteAccess = Electronic Resource
+ElectronicSoundRecordingMedium = Sound Recording Online
+ElectronicThesis = Electronic Thesis
+ElectronicVideo = Electronic Video
+MusicalScore = Musical Score
+VideoTape = Video Tape
+
 ;------
 ; maybe deprecated format translations - remains after checking doubles for new format facets
 ;------