Language updates (thanks to Markus Fischer).

languages/de.ini

@@ -95,6 +95,7 @@ Be the first to leave a comment = "Schreiben Sie den ersten Kommentar"
 Be the first to tag this record = "Fügen Sie den ersten Tag hinzu"
 Bibliographic Details = "Bibliographische Detailangaben"
 Bibliography = "Bibliographie"
+Blu-ray Disc = "Blu-ray Disc"
 Book = "Buch"
 Book Bag = "Zwischenablage"
 Book Chapter = "Buchkapitel"
@@ -570,6 +571,7 @@ login_disabled = "Login steht momentan nicht zur Verfügung."
 login_target = "Bibliothek"
 Logout = "Log out"
 Main Author = "1. Verfasser"
+Main Authors = "Hauptverfasser"
 Major Categories = "Hauptkategorien"
 Manage Tags = "Tags verwalten"
 Manuscript = "Manuskript"
@@ -592,6 +594,7 @@ More catalog results = "Mehr Katalogtreffer"
 More options = "Weitere Optionen"
 More Summon results = "Mehr Zitate"
 More Topics = "Weitere Themen"
+more_authors_abbrev = "et al."
 more_info_toggle = "Mehr/weniger anzeigen."
 more_topics = "%%count%% weitere Themen"
 Most Recent Received Issues = "Die neusten Ausgaben"