The greatest plug-in for cPanel is RVskin :
There are currently 20 languages supported; English, Spanish, Portuguese, French, German, Swedish, Russian, Romanian, Dutch, Brazilian-Portuguese, Simplified-Chinese (GB), Traditional-Chinese (Big5), Polish, Italian, Arabic, Norwegian, Finnish, Indonesian, Japanese -shift_JIS and Japanese-ecu-JS under single RVskin license. Moreover, user can change RVskin language inside the control panel. For other languages is coming soon.
I love using cPanel + RVskin