icu4c/source/data/locales/fr_LU.txt

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html#License
fr_LU{
    NumberElements{
        latn{
            symbols{
                group{"."}
            }
        }
    }
    Version{"2.1.27.99"}
}