Extract and run KMPlayerPortable.
If you drag'n drop a file on (or open with) KMPlayerPortable: it will be opened in KMPlayer.
Language set by launcher according Windows localization: Albanian, Arabic, Belarusian, Bosnian, PortugueseBR, Bulgarian, TradChinese, SimpChinese, Czech, Dutch, English, French, German, Hebrew, Hungarian, Italian, Japanese, Korean, Polish, Portuguese, Romanian, Russian, Spanish, Swedish, Thai, Turkish, Ukrainian.
If you don't want, write SystemLang=false in KMPlayerPortable.ini.
Capture in portable folder. If you don't want, write PortableCapture=false in KMPlayerPortable.ini.
Settings of installed KMPlayer should be preserved.