Javascript方法:

var language = window.navigator.userLanguage || window.navigator.language;//returns value like 'en-us'

如果你正在使用jQuery。I18n插件，你可以使用:

jQuery.i18n.browserLang();//returns value like '"en-US"'

我认为这里的主要问题是浏览器设置实际上并不影响导航器。通过javascript获得的语言属性。

它们所影响的是HTTP 'Accept-Language'报头，但似乎这个值在javascript中根本不可用。(可能是为什么@anddoutoi说他找不到一个不涉及服务器端的参考。)

我已经编写了一个解决方案:我已经在http://ajaxhttpheaders.appspot.com上创建了一个谷歌应用程序引擎脚本，它将通过JSONP返回HTTP请求头。

(注意:这是一个黑客，只有当你没有一个可用的后端，可以为你这样做。一般来说，你不应该在你的页面中调用第三方托管的javascript文件，除非你对主机有很高的信任。)

我打算把它永久地留在那里，所以在你的代码中可以自由地使用它。

下面是一些示例代码(使用jQuery)，告诉您如何使用它

$.ajax({ 
    url: "http://ajaxhttpheaders.appspot.com", 
    dataType: 'jsonp', 
    success: function(headers) {
        language = headers['Accept-Language'];
        nowDoSomethingWithIt(language);
    }
});

希望有人觉得这有用。

编辑:我在github上写了一个小的jQuery插件，它包装了这个功能:https://github.com/dansingerman/jQuery-Browser-Language

编辑2:以下是在AppEngine上运行的代码(真的非常简单):

class MainPage(webapp.RequestHandler):
    def get(self):
        headers = self.request.headers
        callback = self.request.get('callback')

        if callback:
          self.response.headers['Content-Type'] = 'application/javascript'
          self.response.out.write(callback + "(")
          self.response.out.write(headers)
          self.response.out.write(")")
        else:
          self.response.headers['Content-Type'] = 'text/plain'
          self.response.out.write("I need a callback=")

application = webapp.WSGIApplication(
                                     [('/', MainPage)],
                                     debug=False)

def main():
    run_wsgi_app(application)

if __name__ == "__main__":
    main()

Edit3:在这里开放应用引擎代码:https://github.com/dansingerman/app-engine-headers

值得注意的是，维基媒体的通用语言选择器库有这样做的钩子: https://www.mediawiki.org/wiki/Extension:UniversalLanguageSelector

请参见resources/js/ext.ul .init.js中的getFrequentLanguageList函数。直接联系: https://gerrit.wikimedia.org/r/gitweb?p=mediawiki/extensions/UniversalLanguageSelector.git;a=blob;f=resources/js/ext.uls.init.js;hb=HEAD

它仍然取决于服务器，或者更具体地说，取决于MediaWiki API。我展示它的原因是，它可以提供一个很好的示例，用于获取关于用户语言的所有有用信息:浏览器语言、Accept-Language、地理位置(从CLDR获取国家/语言信息)，当然还有用户自己的站点首选项。

基于这里的答案，在JavaScript中访问网页的HTTP头文件，我构建了以下脚本来获得浏览器语言:

var req = new XMLHttpRequest();
req.open('GET', document.location, false);
req.send(null);
var headers = req.getAllResponseHeaders().toLowerCase();
var contentLanguage = headers.match( /^content-language\:(.*)$/gm );
if(contentLanguage[0]) {
    return contentLanguage[0].split(":")[1].trim().toUpperCase();
}

I came across this piece of code to detect browser's language in Angular Translate module, which you can find the source here. I slightly modified the code by replacing angular.isArray with Array.isArray to make it independent of Angular library. var getFirstBrowserLanguage = function () { var nav = window.navigator, browserLanguagePropertyKeys = ['language', 'browserLanguage', 'systemLanguage', 'userLanguage'], i, language; // support for HTML 5.1 "navigator.languages" if (Array.isArray(nav.languages)) { for (i = 0; i < nav.languages.length; i++) { language = nav.languages[i]; if (language && language.length) { return language; } } } // support for other well known properties in browsers for (i = 0; i < browserLanguagePropertyKeys.length; i++) { language = nav[browserLanguagePropertyKeys[i]]; if (language && language.length) { return language; } } return null; }; console.log(getFirstBrowserLanguage());

I can't find a single reference that state that it's possible without involving the serverside.

MSDN上:

navigator.browserLanguage navigator.systemLanguage navigator.userLanguage

从browserLanguage:

In Microsoft Internet Explorer 4.0 and earlier, the browserLanguage property reflects the language of the installed browser's user interface. For example, if you install a Japanese version of Windows Internet Explorer on an English operating system, browserLanguage would be ja. In Internet Explorer 5 and later, however, the browserLanguage property reflects the language of the operating system regardless of the installed language version of Internet Explorer. However, if Microsoft Windows 2000 MultiLanguage version is installed, the browserLanguage property indicates the language set in the operating system's current menus and dialogs, as found in the Regional Options of the Control Panel. For example, if you install a Japanese version of Internet Explorer 5 on an English (United Kingdom) operating system, browserLanguage would be en-gb. If you install Windows 2000 MultiLanguage version and set the language of the menus and dialogs to French, browserLanguage would be fr, even though you have a Japanese version of Internet Explorer. Note This property does not indicate the language or languages set by the user in Language Preferences, located in the Internet Options dialog box.

此外，它看起来像是browserLanguage被弃用了，因为IE8没有列出它