SRL Archive - OSR Help

I was wondering just like in the runescape launcher there is a bar that allows you to change the language so you can use dutch worlds or french worlds. How would do that for S.M.A.R.T.? also, how would would set a script to change the language for you?

you can modify smart to load it but all the text functions and login would be broken.
As login use text color length for detecting login errors and different languages have different length for their words and stuff