Setting the language in Firefox

There are a couple of language parameters of Firefox. You can change them to make your Firefox browser speak a different language to the Web.

It seems that different web sites utilize different parameters to detect your language. So you may want to try both of the following methods.

The first one is the User-Agent Locale parameter. To change it:
* input "about:config" into the Address box, and press Enter;
* Firefox wants you about the danger. Read and click the button to continue;
* input "useragent.locale" in the "Filter" box;
* double click the "general.useragent.locale" parameter and change it to your language, such as "fr-FR". (If you want to set it back, right click the parameter and choose "Reset" from the context menu.)

This changes the language part of the "User-Agent" in the HTTP request header to something like this:

   User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; fr-FR; rv:1.9.1.8) Gecko/20100202 Firefox/3.5.8 (.NET CLR 3.5.30729)\r\n

After the change, go to www.wikipedia.org. It will pre-select your language for you.

The other one is Accept-Language parameter. To change it:
* open the "Options" dialog from the menu "Tools|Options" (or "Edit|Preferences" in Linux);
* select the "Content" icon;
* in the "Languages" section, click the "Choose..." button. A "Languages" dialog pops up;
* add the language you want from the drop-down menu "Select a language to add...";
* in the above language list, select the newly added language and use the "Move Up" button on the right side to move the new language to the top;
* click "OK" button to finish.

This changes the "Accept-Language" of the HTTP request header to something like this:

   Accept-Language: fr-fr,en-us;q=0.7,en;q=0.3\r\n

After the change, go to www.mozilla.com. You will see the Mozilla web site talks to you in your own language now.