For my forum @derletztekick.com, utf8 doesn't work. This is, maybe, a wrong configuration but I believe, it is better to set this value to utf8.
I adapted your idea in my forum, found no side effects and was afterwards a bit astonished, when I saw the value
german.langin the repository.
Ich add the new paragraphs to the language files and check it on another platform. Here, I must set UTF8 to get the right date-string. Maybe, a better fix is to change the date format, i.e. xx. März to xx.03.
I believe, it is not the final solution... but yes.
applied-geodesy.org - OpenSource Least-Squares Adjustment Software for Geodetic Sciences