multilanguage application

now i am developing a web application which is in english.if i want to make that application as global that is multilanguage supported application .how can i do that ...for ex
name textbox control
district dropdownlist control
city dropdownlist control
etc....
in hindi
naam(it must be in hindi letters)
like that...
in chinese language
....
in french language
 
how can i do that,except images text must be in corresponding languages...including tool tips...