The problem is that EU schools don't teach anything other than metric - and so they won't recognise other units for school purposes - whether they are used or not!
I was taught, in the 70's, to use Imperial measurements but we were also informed of, and used, the new metric system - only because it would come in to use very soon after the introduction of new pounds and pence. (with no shillings)
yeah, right!
As Krystal intimates; If it doesn't add to the bottom line of mandated educational requirements - why do it?
Would you do Modifications that you didnt need to?