11 classes are annotated with LanguageNegotiation in Drupal 10

LanguageNegotiationBrowser in core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationBrowser.php

Class for identifying language from the browser Accept-language HTTP header.

LanguageNegotiationContentEntity in core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationContentEntity.php

Class for identifying the content translation language.

LanguageNegotiationSelected in core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSelected.php

Class for identifying language from a selected language.

LanguageNegotiationSession in core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php

Identify language from a request/session parameter.

LanguageNegotiationTest in core/modules/language/tests/language_test/src/Plugin/LanguageNegotiation/LanguageNegotiationTest.php

Class for identifying language from a selected language.

LanguageNegotiationTestTs in core/modules/language/tests/language_test/src/Plugin/LanguageNegotiation/LanguageNegotiationTestTs.php

Class for identifying language from a selected language.

LanguageNegotiationUI in core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUI.php

Identifies the language from the interface text language selected for page.

LanguageNegotiationUrl in core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrl.php

Class for identifying language via URL prefix or domain.

LanguageNegotiationUrlFallback in core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationUrlFallback.php

Class that determines the language to be assigned to URLs when none is detected.

LanguageNegotiationUser in core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUser.php

Class for identifying language from the user preferences.

LanguageNegotiationUserAdmin in core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUserAdmin.php

Identifies admin language from the user preferences.