LANG. The LANG environment variable deals with the language of a Linux system. When we specify a language using the LANG variable, it’ll use that variable to print out messages in the language we choose.

What is Lang variable?

LANG is the normal environment variable for specifying a locale. As a user, you normally set this variable (unless some of the other variables have already been set by the system, in /etc/profile or similar initialization files).

What is Lang C in Linux?

LANG=C is a way to disable localization. It’s used in scripts to predict program output which may vary based on current language. For more information read this. Copy link CC BY-SA 3.0.