Translations (i18n l10n) (category)

gettext

Allows you to change a translated string (text).
gettext_with_context

Allows you to change translated text whose translation is requested with a translation context by the _x() function.
ngettext

Allows you to change a string translated by _n().
override_load_textdomain

Allows you to override loading the translation .mo file for a specified text domain.