Hi E-John ,
LCIDs are identifiers used to specify localizable information. They are also known as culture identifiers in the Microsoft .NET Framework environment.
An LCID is a 4-byte value. The value supplied in an LCID is a standard numeric substitution for the international [RFC5646] string.
More details you can refer to these documents.
[LCID Structure]
In the directory on the left side of the document, you can get more information about LCID.
Best Regards,
Daniel Zhang
MSDN Community Support
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