Have you ever felt frustrated because you can't see the special charcters, ḓṱḽṋṅ, needed by Tshivenda? Most likely you don't have a font that can display those characters.  You'll need the DejaVu font that Translate.org.za enhanced so that you can view these characters.

DejaVu font

But you might want to install these together with the South African keyboard so that you can actually type all characters needed by Venda, Afrikaans, Northern Sotho and Tswana.

To install the font simply unzip it and drag it to your fonts directory on Windows (e.g. C:\Windows\Fonts). On Linux the DejaVu font should already be available if you have a relatively new distribution.