The current range includes:
Chirp! USA features birds from across continental USA (excl Alaska).
Chirp! Canada (coming soon) features birds from across Canada, and includes bird names in French and English
Chirp! Europe features birds of north-west Europe. It is available in English, German, French, Dutch, Swedish and Norwegian and also partially translated into Danish and Irish Gaelic. The app runs in the main language of your iPod/iPhone but to see the bird names and song comments on another language, go to the main settings of your device, scroll down until you see the Chirp! settings and choose a language from the list.
Cheap Chirp! and Chirp! Lite are free cut-down versions of Chirp! designed to give you a taste of the full version.