chromium/src/third_party/blink/renderer/core/frame/navigator_language.idl

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// https://html.spec.whatwg.org/C/#language-preferences

interface mixin NavigatorLanguage {
    [HighEntropy=Direct, MeasureAs=NavigatorLanguage] readonly attribute DOMString language;
    [CachedAttribute=IsLanguagesDirty, HighEntropy=Direct, MeasureAs=NavigatorLanguages] readonly attribute FrozenArray<DOMString> languages;
};