Deprecation: #73511 - BrowserLanguage detection moved to Locales

See Issue #73511

Description

The CharsetConverter contained the calculation to find the corrent language based on the browsers language settings at the backend login screen.

The according code has been moved to TYPO3CMSLocalizationLocales. The method CharsetConverter::getPreferredClientLanguage() and the property CharsetConverter::charSetArray have been marked as deprecated.

Impact

Calling CharsetConverter::getPreferredClientLanguage() will trigger a deprecation log entry.

Affected Installations

All installations with a third-party extension using the CharsetConverter language resolving directly.

Migration

Use the method Locales->getPreferredClientLanguage() instead.