Problem: shell language is not in English
$ hello
-bash: hello: コマンドが見つかりません
Solution: Add this to
export LANG="en_US.ISO-8859-1"
to your .bash_profile. Log out and log back in. Now:
$ hello
-bash: hello: command not found
Code strings for other languages, type:
locale -a
at the terminal and the system will list all that are supported.