Ah ok. Microsoft and their naming things… But interesting to know :)

It’s rare that I find fellow BC devs in the wild.

X++? What happened to AL?

Internally Excel saves it in English (or some internal code) and translates it when opened.

My company switched from Excel-Interops, where you had to send the German function name to Excel. Now we write .xlsx files directly and have to send the English function name. But when opened it displays all functions in German (or whatever localization Excel is set to).