Untranslated strings not found in translation database
I searched on https://translate.gajim.org/projects/ for some strings, like "Stream closed by us: Replaced by new connection" (I tried different substrings, i.e. "Stream closed") and could not find where to translate it.
Another issue are the status which are used in system messages, like "xxx ist jetzt Available" which should be with a full translation "xxx ist jetzt verfügbar".
Strings seen in debian "1.0.0~alpha2-1" release and searched for at https://translate.gajim.org/de/gajim/ The website shows a rather complete translation, while in the debian version e.g. the full "view" menu is untranslated.