First he will ask you what language you want to use (you still type things in English no matter what, but he will say what you typed in the language you selected) and you have to type in what language you want to use (it doesn't matter if you type it in with a capital first letter or not) and then he will tell you to say anything you want, at this point you can type in anything and he will say what you typed in in the language you selected earlier. The box on the top left says what language you selected, the language is automatically set to English when you press the flag.
All by me Some things won't say what you want it to if Scratch doesn't understand it.