The NavigatorLanguage.language read-only property returns a string representing the preferred language of the user, usually the language of the browser UI.
Syntax
lang = globalObj.navigator.language
Values
A string representing the language version as defined in BCP 47. Examples of valid language codes include "en", "en-US", "fr", "es-ES", etc.
Example
if (window.navigator.language != "en") {       
  doLangSelect(window.navigator.language); 
}
Specifications
| Specification | Status | Comment | 
|---|---|---|
| HTML5.1 The definition of 'NavigatorLanguage.language' in that specification. | Working Draft | Initial definition | 
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari | 
|---|---|---|---|---|---|
| Basic support | (Yes)[1] | 1.0 (1.7 or earlier)[2] 5.0 (5.0)[3] | 11.0[4] | (Yes) | (Yes) | 
| on WorkerNavigator | ? | 35 (35) | ? | ? | ? | 
| Feature | Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | 
|---|---|---|---|---|---|
| Basic support | (Yes) | 1.0 (1.0) | Not supported[4] | (Yes) | (Yes) | 
| on WorkerNavigator | ? | 35 (35) | Not supported | ? | ? | 
[1] Returns the browser UI language, not the value of the Accept-Language HTTP header.
[2] Prior to Gecko 2.0 (Firefox 4 / Thunderbird 3.3 / SeaMonkey 2.1), this property's value was also part of the user agent string, as reported by navigator.userAgent.
[3] Starting in Gecko 5.0 (Firefox 5.0 / Thunderbird 5.0 / SeaMonkey 2.2), this property's value is based on the value of the Accept-Language HTTP header.
[4] Closest available (non-standard) properties are userLanguage and browserLanguage.