Sets LANG environment variable to wrong value

[alexreg]

Does this issue occur when all extensions are disabled?: Yes

• VS Code Version: 1.75.0
• OS Version: macOS 13.1

Steps to Reproduce:

1. Launch VS Code.
2. Open a new integrated terminal.
3. Enter the command echo $LANG
4. Observe that the value of the LANG environment variable is wrong; in my case, en_US.UTF-8 even though it is correctly en_GB.UTF-8 elsewhere on my system (for example in the Terminal app).

Note, the same or a very similar issue was reported back in October 2016.

[Tyriar]

@rzhao271 probably a regression from your recent changes in the area?

vscode/src/vs/workbench/contrib/terminal/common/terminalEnvironment.ts

Line 109 in 9e5544b

export function getLangEnvVariable(locale?: string): string {