Linux terminal garbled

Linux terminal garbled-Linux general technology-Linux technology and application information. The following is a detailed description. For a Linux Virtual Machine (with a desktop environment) on Microsoft Virtual PC 2004, the default language is simplified Chinese. When I press ctrl + alt + F1 to switch the terminal, when you press a command, the prompt should be a Chinese prompt, but it is all garbled and I don't know how to solve it, by searching for information, I learned that the "# export LANG C" command can prompt the terminal to change the scale in English. But what is export? What other functions does it have in linux?

Export:
Function: sets or displays environment variables.
Syntax: export [-fnp] [variable name] = [variable setting value]
Note: When the shell executes a program, the shell will provide a set of environment variables. Export allows you to add, modify, or delete environment variables for subsequent programs. The effect of export is only for this login operation.

Parameters:
-F indicates the function name in [variable name ].
-N: Delete the specified variable.
-P: list all environment variables that the shell assigns to the program.