PolyTextOut API – Does It Work?

As MSDN says,

The PolyTextOut function draws several strings using the font and text colors currently selected in the specified device context.

The article also mentions ExtTextOut as a simpler sister function:

To draw a single string of text, the application should call the ExtTextOut function.

It looks like the API is not so Unicode friendly. Code as simple as

PolyTextOut(L"Мама мыла раму");
PolyTextOut(L"Mother washed window");
PolyTextOut(L"ママソープフレーム");
PolyTextOut(L"დედა საპნის კარკასი");

ExtTextOut(L"Мама мыла раму");
ExtTextOut(L"Mother washed window");
ExtTextOut(L"ママソープフレーム");
ExtTextOut(L"დედა საპნის კარკასი");

Outputs correctly in case of ExtTextOut, while PolyTextOut stumbles on strings in Japanese, Georgian. All right, so why did it do Russian?