@mattgrayyes @q I don’t have a non-English copy of Excel to hand to test with, but based on downloading an example German XLSX file, it seems that Excel uses the English names internally, localising and delocalising them for user interaction. So if I create a file with `=SUM` and give it to a German, their interface will show `=SUMME`. (This may also be related to why Excel always changes function names to be in all caps?)