Hallo webratte,
what is the official (registered) name of Delta Chat? On F-Droid it’s called “Delta Chat” but there are also other combinations like “DeltaChat” (your article) or “Delta.Chat” around and Wikipedia article should show the official one.
(hopefully the article won’t become a victim of Wikipedia’s “relevance dictatorship” upon release, especially the German branch seems to be very fast with deletion requests).