Now I got the point. Its 1.9 version only.
U odgovoru na Ralf Hilgenstock
Re: Reply on "fixes needed in langconfig.php"
napisao/la David Mudrák -
Yes, that's what the line
Invalid decsep and/or thousandssep in German {de} at 1.9!!
is trying to say. And that's why I was referring to CVS. Since 2.0, strings are not in CVS any more. I am happy it's clear now.