@christianp I mean, in written text like emails or chat where typesetting isn't as critical, it's usually obvious what one means. If there is a space after a comma, it's not parts of the number. So you'd say something like: the lengths were 1,2, 3,0 and 3,3 metres (but in Swedish of course).
I've never written maths in LaTeX in Swedish, so I'm not sure how you'd do it there. There is a package called icomma that I see a university mention in their guide.
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