constant LANGUAGE_TYPE_INTERFACE

language_types_get_default in includes/bootstrap.inc

Returns a list of the built-in language types.

LocaleDateFormatsFunctionalTest::testLocalizeDateFormats in modules/locale/tests/locale.test

Functional tests for localizing date formats.

locale_language_negotiation_info in modules/locale/locale.module

Implements hook_language_negotiation_info().

locale_language_selector_form in modules/locale/locale.module

Form builder callback to display language selection widget.

LocaleLanguageSwitchingFunctionalTest::testLanguageBlock in modules/locale/tests/locale.test

Functional tests for the language switcher block.

... See full list