Far too tough for me so I’ve stuck it in the fiendish category ( I think some people mark down when they don’t get it ). I could only work out 4 clues so not enough to get categories. I don’t know a certain language and some clues would be easier to get if you were from the US I think. One I’ve never heard of but a quick search says it’s popular in the US. Thanks for posting.

Too American for us Brits. However 12 ounces does not equal a pound unless you meant three quarters of a pound, thereby making it even more obscure.

MRH, don't forget 'in Troy' that bit is very important

The german number category could also be clues to monopoly. One of the community chest cards makes you pay for insurance