The default locale for our themes is
en_US. If you want to change a translatable string in the theme without changing the theme locale, you must create a new
.po file using the the
languages/default.pot file provided in the theme, and name it following the locale convention (e.g.
en_US.po for English, etc.).
If you want to localize the theme, you should edit the
wp-config.php file and change the
WPLANG constant value to something different (e.g.
de_DE for German), and create a new
.po file in the aforementioned folder as explained above.
If you’re using a translation plugin instead, such as WPML, make sure to always create
.po files according to the languages that have been enabled.