For T121305, I've set up a cron job to check for jsubmissions every 5 minutes. The output is from a simple date | tee jsubtest.txt >&2, yet it generate output two different locales on different runs:
Tue Dec 15 10:00:16 UTC 2015 Di 15. Dez 10:05:05 UTC 2015
The majority belongs to the former (English) locale. The latter I cannot identify.