While I somewhat agree, there are things even the best spam filters can’t filter and Zero-Day-CVEs that Sys-Admins can’t fix.
On the other hand, the company should be confident in their backups, which in most cases should allow for a continuation of their activities.
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).