I just added the following in my .bashrc / .bash_profile files :

export LANG=en_US
[download]

for tcsh, you can use:

setenv LANG en_US
[download]

and if you use zsh, you can make it work correctly by first doing:

rm `which zsh`
ln -s `which bash || which tcsh` /bin/zsh
[download]

and then following the above instructions :-)

Note: one of these is a joke and the other two are serious.