Scope of the environment variable %PAL:LanguageCustom%
I've read through several times the complete documentation of Languages. Based on the explanations in the "Setting a custom language environment variable" I've come to the conclusion, that the environment variable %PAL:LanguageCustom% exclusively will be applied in the PortableApps.com Platform. This environment variable is generated by the sections [Language] and [LanguageStrings].