Create a file named thunderbird in directory /usr/local/sbin Set owner to yourself (chown youruser:youruser) Make it executable (chmod +x thunderbird)Ok, this is how the file like: !/bin/shexport LC_TIME=nl_NL.utf8 # or whatever you want [ “$LC_ALL” != “$LC_TIME” ] && unset LC_ALL # only necessary if set to something different from LC_TIME exec /usr/bin/thunderbird “$@”