Applocale is described as 'The Microsoft AppLocale (or Application Locale) utility is a temporary solution to the limitations caused by non-Unicode applications running on the Unicode (UTF-16) based Windows XP'. There are four alternatives to Applocale for Windows. The best alternative is Locale Emulator, which is both free and Open Source. Other great apps like Applocale are NTLEA (Free, Open Source), LocaleSwitch (Free) and SBAppLocale (Free).
Locale Emulator is a tool similar to MS AppLocale and NTLEA, providing a simulation function that can make an application recognize your OS as in a language other than the real one. It is quite useful when you are trying to play country-specific games.