修改Grub和登陆界面以及XTerm语言为英文？

新手园地
1

我修改了系统语言，但是Grub和登陆界面以及XTerm语言仍然是中文，有的地方有乱码，请教如何修改？

2

wiki.debian.org/ChangeLanguage
su

export LANG=en_US.UTF-8

shift-insert
dpkg-reconfigure locales
update-grub
A window will ask you to select the languages (you select with SPACE) you want to have available. Choose your own.
Changes may not show immediately, a reboot will be needed.