| Zend_Locale | Base class for localization |
| Zend_Locale_Data_Translation | Definition class for all Windows locales |
| Zend_Locale_Exception | |
| Zend_Locale_Math | Utility class for proxying math function to bcmath functions, if present, |
| Zend_Locale_Math_Exception | |
| Zend_Locale_Math_PhpMath | Utility class for proxying math function to bcmath functions, if present, |
| Zend_Translate_Plural | Utility class for returning the plural rules according to the given locale |
| Zend_Locale_Data | Locale data reader, handles the CLDR |
| Zend_Locale_Format |