How to change language only for terminal

You can add a line

export LANG=C

to the end of your ~/.bashrc file and restart the terminal.

All program output will be in English.

An Alternative approach is to run this:

export LC_ALL=en_US.UTF-8

For more permanent solution for you own user account only just put the command above into ~/.bashrc file

You will see the change in your next terminal session. For an immediate change without the need of a new terminal session run:

source ~/.bashrc

In case of multiple terminal sessions (eg. using terminator) you will need to run the command above on each one of them.

So any terminal related error message will be in English (as fas as any gnu-utils related software).