Should this script be a definition script? Then it will be executed all the time, right? So you can't change the language.
I'm not sure what you want to do, but if you want to create options to change language of text and speech seperately then you should execute these lines whenever the specific options button is pressed and according to the selected language.
Oh yes, so I wanted to set these languages as the "normal" languages if you start the game. Later you should change the language in the options if you want. Im not quite sure how to solve this. I set this as a definition script just to see if it works, i hope this was right. I also translated just one sentence, just to see if it works, like a test. But I think this isnt bad.