How to modify default system languages of fedora and redhat

Fedora and redhat default system language modification method 1. execute the "export: declare-xLANG & quot; en_US & quot;" LANE environment variable in shell, which we want to modify, but where can I modify it? 2. use manbash: Whenbashis fedora and redhat to modify the default system language. 1. execute export :... declare-x LANG = "en_US "... this LANE environment variable is something we want to modify. but where can we modify it? 2. use man bash: When bash is invoked as an interactive login shell, or as a non-interactive shell with the -- login option, it first reads and executes commands from the file/etc/profile, if that file exists. after reading that file, it looks ~ /. Bash_profile ,~ /. Bash_login, and ~ /. Profile, in that order, and reads and executes commands from the first one that exists and is readable. the -- noprofile option may be used when the shell is started to inhibit this behavior. that is, bash reads the configuration files:/etc/profile ~ /. Bash_profile ~ /. Bash_login ~ /. Profile 3. the default shell language should be modified in the system-level file (/etc/profile) so that the modification result can be inherited by every user: open/etc/profile, the LANG variable setting command cannot be found directly on it, but the script also runs other scripts :... for I in/etc/profile. d /*. sh; do if [-r "$ I"]; then. $ I fidone... 4. to/etc/profile. d/directory, view these *. sh script, found a file named "lang. sh "file, it should be: open/etc/profile. d/lang. sh, starting with a few words :... for langfile in/etc/sysconfig/i18n $ HOME /. i18n; do [-f $ langfile] &. $ langfile & sourced = 1done... this/etc/sysconfig/i18n is the place where the default system language is set. for my system, its content is as follows: LANG = "en_US" SUPPORTED = "en_US: en "SYSFONT =" lat0-sun16 "SYSFONTACM =" iso01 "if you want the system's default language to change to UTF-8, you can change LANG to: LANG =" en_US.UTF-8"