Change git's language to English without changing the locale
You can add alias to you .bashrc or .bash_profile
alias git='LANG=en_US.UTF-8 git'
If LANG doesn't work, try LC_ALL or LANGUAGE
This worked for me:
echo "export LANGUAGE='en_US.UTF-8 git'" >> ~/.bashrc
Ubuntu 14.04 LTS, git version 1.9.1