Comment # 18 on bug 939153 from Frank Kruger

Given today's update to Thunderbird 52.4 (in German) from the Mozilla repo with
calendar UI and preferences switching again from German to English reminded me
of the unsolved issue.

In view of the upstream situation at
https://bugzilla.mozilla.org/show_bug.cgi?id=1266696, is there any chance for a
local solution? Thx.