I have some data e.g.:
01-Oct-2017 00:44:40
02-Feb-2018 04:20:12
My german Excel recognizes the second date, but not the first one. The reason is that "Feb" is also "Feb" in German, but "Oct" is "Okt".
I tried setting my language to English in the general options and the location in the "Format Cells" settings to the US.
As I wrote in the comments, if this is for a one-time event, try setting your control panel --> Windows Regional Settings to English. Excel will then parse the dates correctly.
If you need a formula to do this repeatedly, you can use INDEX(MATCH
to convert the English to German, and then format it how you want.
The below example translates German to English, but you can adapt it easily to go the other way.
B1: =IFERROR(--REPLACE(A1,4,3,INDEX($E$1:$E$12,MATCH(MID(A1,4,3),$D$1:$D$12,0))),A1)