The default language of some of the Nintendo DS lite consoles especially the once in Ice Blue, Enamel Navy and Carol Pink colours is not English takes no more than 30 seconds to change to English.
The video shows you how to change the DS Lite language: http://www.youtube.com/watch?v=yOzXA0HBJVs&feature=user .
Also, English manual can be downloaded from Nintendo DS Lite site: http://www.nintendo.com/consumer/downloads/DSLite_english.pdf
http://www.hitari.co.uk/