Question

May i know what HTML codes should be use to ask browser install language packs in the language is not install on the browser? Is this only for IE? how about other browsers?

Answer 1

I guess you want to make sure your audience can read your website properly.

It is not a good practice to force user to install or config a lot before he can use your app/site. Rather than that, you should plan and design it well.

You may find great solution in Google Web Font:
https://developers.google.com/webfonts/

Example:

@font-face {
    font-family: 'Tangerine';
    font-style: normal;
    font-weight: normal;
    src: local('Tangerine'), url('http://themes.googleusercontent.com/font?kit=_jMq7r9ahcBZZjpP8hftNA') format('truetype');
}

*note: you can set the priority in CSS, so users can use existing fonts in their computer, for example in CSS:

Verdana, “Microsoft JhengHei”, “微軟正黑體”, “Microsoft YaHei”, “微软雅黑”, Tangerine, sans-serif, serif

Browser will download the font (quietly), only if need.

However, I would doubt that user will understand the contents you provided, if s/he doesn’t install the language pack or fonts. Rather, I would monitor the traffic source (e.g. Google Analytics) and build for specify market segment.

Please, give up any Active-X and similar stuff, and stick with modern web technology. Unicode, web fonts, CSS are your friends.