[Cesar82]

I really think ASIS needs a little fix in the source code.
The label "MB" in Inno Setup languages is not constant in all languages.
Edit ASIS "Script.iss" and add the lines highlighted in RED (Place the lines in the same order as below).

function FormatDiskSpaceLabel(Labl: String; Size: Extended): String;
begin
  Result := Labl;
  StringChangeEx(Result, '[mb] MBs', '[size]', True);
  StringChangeEx(Result, '[mb] Мб', '[size]', True);
  StringChangeEx(Result, '[mb] Mo', '[size]', True);
  StringChangeEx(Result, '[mb] MB', '[size]', True);
  StringChangeEx(Result, '[size]', FormatBytes(Size, 2, False), True);
end;