hook_language_switch_links_alter in core/modules/system/language.api.php

Perform alterations on language switcher links.

language_fallback_get_candidates in core/includes/language.inc

Returns the possible fallback languages ordered by language weight.

language_types_get_default in core/includes/bootstrap.inc

Returns a list of the built-in language types.

LocaleLanguageNegotiationInfoFunctionalTest::testInfoAlterations in core/modules/locale/tests/locale.test

Tests alterations to language types/negotiation info.

LocaleMultilingualFieldsFunctionalTest::testMultilingualNodeForm in core/modules/locale/tests/locale.test

Test if field languages are correctly set through the node form.

LocaleUninstallFunctionalTest::testUninstallProcess in core/modules/locale/tests/locale.test

Check if the values of the Locale variables are correct after uninstall.

locale_language_negotiation_info in core/modules/locale/locale.module

Implements hook_language_negotiation_info().

locale_language_types_info in core/modules/locale/locale.module

Implements hook_language_types_info().

locale_test_language_negotiation_info in core/modules/locale/tests/locale_test/locale_test.module

Implements hook_language_negotiation_info().

locale_test_language_types_info_alter in core/modules/locale/tests/locale_test/locale_test.module

Implements hook_language_types_info_alter().