It's only a difference in spelling, also I checked it, tonne is established spelling for metric ton. I don't think other languages use different ones, my doesn't for sure.
Edit - I’m open to learning, but I sincerely do not understand the unexplained downvotes. The spelling of “tonnes” vs “tons” is the premise of my comment
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u/Yurasi_ Dec 05 '24
It's only a difference in spelling, also I checked it, tonne is established spelling for metric ton. I don't think other languages use different ones, my doesn't for sure.