Form of Date on Labels/QSLs

[dl5dsm]

I installed swisslog in German.  If I print labels or QSL the date is written like: 31.Mrz.2019
If I switch the language to english, the date does not change to 31.Mar.2019
All the time I print labels I have this problem now for more than 20 years.
A date should be ever in an english or american form.
Jordi, Pse change label-language to english, also when I use the german version.
Some of the hams will not understand Mrz....
And dont tell me I should use 31.03.2019