is a settable global variable that specifies the default language used by the Wolfram System.
- $Language is used to determine the language used for messages and other system notifications.
- All language names are conventionally given in English and are capitalized, as in "French".
- When a message with a name s::tag is requested either internally or through the Message function, the Wolfram Language searches for a message with the name s::tag::lang corresponding to $Language. Only if it fails to find such a message will it use the message with the actual name s::tag.
Introduced in 1991