Report multilanguage date format

Hi,

on the report SalesQuotation I have a date-field RespiteDate from Table SalesQuotationJour.
We are a german company so we format the date like 01.03.2016 (DD.MM.YYYY). Now we want to send the quotation to a US customer, so we want to format it like 01-Mar-2016.
So I changed the following in fetch method:

element.design().languageID("en-us");

CustQuotationJour_RespiteDate.dateMonth(5);

CustQuotationJour_RespiteDate.dateSeparator(7);
CustQuotationJour_RespiteDate.dateYear(3);

But now the date looks like this: 01-Mär-2016. The month (3 digits) is still in german language.

How can I translate it to "Mar" in english language?
I don't want to make a string-field and format/translate it by code!

Thanks for help!