multi lang?

[eluser]hellomoto[/eluser]
Hi everybody,
i am new in codeigniter and find it good enough,
and i have a question about how to design project that,it can support multiple language?
there are some solutions :
1.different view files ( it has maintaince problem)
2.key value in all languges (slow down app)
3. ?

and one more problem, imagine that when you enter to site there is language choices according to choice it directs user to relevant language,
and my question is, what are the steps i have to follow at behind (in code - backend)?
(do i have to keep choice in session or in cookie .....)

[sorry 4 bad english and sorry if there exist similar topics]

[eluser]hellomoto[/eluser]
okey i found some usefull topics
1

[eluser]BorisK[/eluser]
I'd never go with different views. I've seen sites with this approach. It becomes a nightmare to apply changes even with only two languages.

[eluser]hellomoto[/eluser]
yes i also decided on second option. key value and one view file..