Andrew,

When switched to French I detected a typo in the drop down box for Lineweight.

Weight 2.11mm is listed as 1.58mm {2.11m?}
https://github.com/qcad/qcad/blob/master/ts/qcadcore_fr.ts#L1228-L1229
Also see attached image file.

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May I ask why only ISO types have a comma instead of a point in French.
The use of a comma is uncommon in the Property Editor even when that is the native decimal separator.
I also detect an extra space between the value and 'mm' and that only for the ISO types.

This only occurs in:
https://github.com/qcad/qcad/blob/master/ts/qcadcore_fr.ts
https://github.com/qcad/qcad/blob/master/ts/qcadcore_pl.ts
https://github.com/qcad/qcad/blob/master/ts/qcadcore_pt.ts

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Probably not OS or QCAD version related.

Regards,
CVH