Comment # 1 on bug 1112361 from Arvin Schnell

I can reproduce the problem with a simple C++ program:

int
main()
{
    locale::global(locale(""));
    cout.imbue(locale());
    cout << 1000 << endl;
}

The thousands-separator is not displayed correctly in the locale
is fr_FR.UTF8.

LANG=fr_FR.UTF8 ./test | hexdump -C
00000000  31 e2 30 30 30 0a                                 |1.000.|
00000006

AFAIS e2 alone is not valid UTF-8.

Also see bug #1079630 and #1079855.