Thousand separator between devices that use different separator style.

A mildly long question and perhaps quite a unique problem:
So recently I was tasked with developing an adobe pdf with fillable forms for salespeople to use in front of buyers. The salespeople would use a tablet with a pdf reader. This pdf reader is unable to read complex javascripts so i have to work with a lot of hidden numbers being multiplied(no dividing is allowed on the tablet and no multiplying by 0.5 or 0,5 or 50%). I later found out that for a few of the hidden numbers there are decimal points such as 4.5 etc. in my country that would be written as 4,5. But a number of salespeople have a tablet that uses "." for decimals and a number have "," for decimals. The workaround for this was using percentages so instead of 4,5 I would write 450%. I was recently informed that the underlying numbers would need to be changed periodically think every 2-3 months. This would usually take forever but i saw that you can export form values from excel to adobe. Adobe does not let me import percentages from excel to adobe it gives me error message "Value entered does not match format field". I tried several workarounds none of them seem to have worked. Does anyone have any clue how to solve this?