I am working with Sigil 0.9.7 Windows 32bit.
As i can see, the words are add to the dictionary, but are still recognized as misspelled in the text.
This (’) is the German Auslassungszeichen, so i do not like to change it to a (').
Apostroph – Wikipedia
https://de.wikipedia.org/wiki/Apostr...afisch_korrekt