Locale files are named for their locale code. For example, the
en_US file is named en_US.php,
the pt_BR file is named
pt_BR.php, and so on.
Locale files are placed in a subdirectory of the class; the
subdirectory is always named Locale. For example,
locale files for the Acme_Example class are located
at Acme/Example/Locale/*.
Acme/
Example.php
Example/
Locale/
en_US.php
pt_BR.php