It's been my experience that Excel spreadsheets are not transferable from one locale to another. Maybe there is a "culture-invariant" version of a spreadsheet but I haven't found it.
Even the CSV export of Excel sets the separator based on locale, rendering them hard to use in international setting. I work at a European statistics office, and although there's SDMX, it's not under Save-as in Excel.
It's another reason to potentially port this thing to the browser one day... https://github.com/ianand/spreadsheets-are-all-you-need/issu...