the multi language website can be developed in these three ways, they are

* Dynamic Content Generation
* Site Replication, and
* Selective Replication

METHOD 1

Dynamic Content Generation

Although this method is a very complicated way of organizing your site to support different languages, it could be an option if you have only two languages, or even three to support on a fast server. It is also a good idea to use this option only if your site is not huge.

In this method all the text of the site is stored in a database. Every page carries a variable (a session variable or a query string) to identify which language the site is to be displayed in. Based on that, the content is pulled out from the respective tables for the language chosen, and displayed.

This method has many disadvantages. A few significant ones are:

* There could be a performance degradation of the site if the amount of content of the site is huge.

* Editing the site would require you to either directly edit the content in the tables, or alternatively provide an admin panel to edit the content of each page on the site!

* The load on the database is too high which could lead to lower performance


METHOD 2

Site Replication

This is one of the most commonly used methods on the web. In this approach the main site, which is in the default language of the website, resides in the root folder of the site. This basically is how a website is when it's a single-language site. When you want a site in German you would replicate the entire site into a directory, say German. The links in the German site should refer to the corresponding pages on the German site only. Now typing www.mysite.com would give the site in the default language, but www.mysite.com/german would give the German version of the site. On every page of the site you would have a select box with language choices. All this box does is to re-direct the user to the same page that sits on the chosen language site.

Do use proper tools when replicating the site. If you were to do it manually you will have to edit each other files on the site and correct the links on them to point to the pages on the language site. If you use a tool like Dreamweaver, for example, this task will be done automatically.

METHOD 3

Selective Replication

Of the three methods we discuss in this article, this is the most efficient one. Although difficult to set up the first time, the maintenance effort is lower than the other two methods discussed. This method is used by many major websites, including Microsoft, for multi-language support.

In Selective Replication we have the main site, which has no content or images whatsoever. The various images sit in various folders marked EN, GR, ES, etc depending on the languages. All the files that go into each of these directories have the same names. So, the English logo file name will be logo.gif, and so will the logo file for the other languages too.

The content (messages, javascript alerts, etc) have two places in which they can be stored. One way is to store each individual message as separate text files, or an alternative way is to make them sit in an array which is included in every ASP file and the message that needs to appear is called from the array. Each language has a separate array which resides in its directory. So the array include depends on the language that is chosen by the user. For information on how to create/use an array for this purpose, please see my article on "efficient use of arrays".

This method has no stress on the database. The database is designed to hold generic information applicable for all the languages.

refer:-- Multi-Language Web Site Development