language_negotiation_configure_url_form in core/modules/locale/locale.admin.inc

Builds the URL language provider configuration form.

language_negotiation_configure_url_form_validate in core/modules/locale/locale.admin.inc

Validation handler for url provider configuration.

LocaleUILanguageNegotiationTest::testLanguageDomain in core/modules/locale/tests/locale.test

Tests url() when separate domains are used for multiple languages.

LocaleUILanguageNegotiationTest::testUILanguageNegotiation in core/modules/locale/tests/locale.test

Tests for language switching by URL path.

LocaleUrlRewritingTest::testDomainNameNegotiationPort in core/modules/locale/tests/locale.test

Check URL rewriting when using a domain name and a non-standard port.

locale_language_from_url in core/includes/locale.inc

Identify language via URL prefix or domain.

locale_language_url_rewrite_url in core/includes/locale.inc

Rewrite URLs for the URL language provider.