Currently, properties files for the ResourceBundle need to be encoded in ISO 8859-1. If the developers want to include texts that cannot be represented in ISO 8859-1, such as Japanese, they must use the unicode escape form (\uXXXX) for those texts. It is doable with some tools to convert non ISO 8859-1 texts into those unicode escape sequence, such as 'native2ascii' tool, but that is very annoying and error prone to the non-tech type translators.

Some easier way to create properties files without the unicode escape is desirable.