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

• VS Code Version: 1.107.1
• OS Version: Arch Linux (rolling release, so no version)

Steps to Reproduce:

1. run VS Code with the LANGUAGE environment variable set to something other than en_*, such as de (make sure the locale is enabled in /etc/locale.gen and gen-locale has been run so the data is available)
2. open a project containing a git repository
3. modify a file
4. try to switch git branches

Expected behavior: A popup offering to “migrate changes” to the new branch using git stash

Observed behavior:

A popup informing me that the operation failed, offering only to view logs and command output

The Git extension’s logs show the following (German) output

> git checkout -q pa/pandas-3
Fehler: Ihre lokalen Änderungen in den folgenden Dateien würden beim Auschecken
überschrieben werden:
	src/scanpy/_utils/__init__.py
Bitte committen oder stashen Sie Ihre Änderungen, bevor Sie Branches
wechseln.
Abbruch

More details: This is because of this regex, which expects english command output

VS Code does set LC_ALL=en_US.UTF-8 and LANG=en_US.UTF-8, but LANGUAGE=de overrides this for software like Git that uses gettext (explained here in gettext’s docs)

❯ env LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 LANGUAGE=en git -h
usage: […]
❯ env LANG=en_US.UTF-8 LC_ALL=en_US.UTF-8 LANGUAGE=de git -h
Verwendung: […]

Proposed fix:

also set LANGUAGE=en there.