https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-LCID/%5bMS-LCID%5d.pdf#%5B%7B%22num%22%3A72%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C69%2C574%2C0%5D "When an LCID is requested for a locale without a permanent LCID assignment, nor a temporary assignment as above, the protocol will respond with LOCALE_CUSTOM_UNSPECIFIED for all such locales. Because this single value is used for numerous possible locale names, it is impossible to round trip this locale, even temporarily. Applications should discard this value as soon as possible and never persist it. If the system is forced to respond to a request for LCID_CUSTOM_UNSPECIFIED, it will fall back to the current user locale. This is often incorrect but may prevent an application or component from failing. As the meaning of this temporary LCID is unstable, it should never be used for interchange or persisted data. This is a 1-to-many relationship that is very unstable."
pub const LOCALE_CUSTOM_UNSPECIFIED = 0x1000pub const LOCALE_CUSTOM_UNSPECIFIED = 0x1000