As a result of his days with the babysitter, his japanese vocabulary and understanding is also increasing. The babysitter told me he says the following words to her: (of course, pronunciation takes some getting used to. It sounds like babytalk but after you hear it a few times you definitely can tell what he's getting at!)
Dõzo (here you go, please)
Itadakimasu/Gochisosamadeshita (what you say before and after eating)
Ochita (it fell)
Dekita (I did it)
Konnichiwa (hello)
Aruku (walk)
Pan (bread)
In English he has added some words. He now says:
Please
Play
Walk
Milk
Bye-bye (sounds more like "bye"... a month ago it was more of a "baa")
Peepee/poopoo
Ball
sock
shoe
baby
He has also started saying his name and his sister's name. It's very cute when he runs around the house looking for her and yelling "Leelia, Leelia." Or he wants to play hide and seek so he starts saying his name "Ale? Ale?" to let you know you should start looking for him.
In German, to be honest I am not sure if he has many new words because I'm not the one speaking German with him. I'll have to get some input from Roland here! But Alexander is quite good at saying danke and bitte (thank you and please). He also seems to understand papa quite well.