Hmmm ... I am not sure how to follow up the post (i.e., after the film) ...
So, I hope everyone is ok if I just post here ...
I like the song, and it is always good to know what they are singing ...

Howl's Moving Castle Theme Song
-- Sekai no Yakusoku / The Promise of the World 
karaoke.windain.net/lyric...usoku.html