# Functions
GetLangFromRequest is a helper func to get the language tag based on the HTTP request and the constructed message catalog.
GetMessage is a helper func to get the translated message based on the message ID and lang.
GetMessageOrDefault is a helper func to get the translated message based on the message ID and lang.
# Structs
DefaultLocaleBundle is a bundle of messages for the specified locale.
DefaultMessage is a single message in the locale bundle identified by 'ID'.
# Interfaces
MessageCatalog declares the interface to get globalized messages.