Changes

| lang ||en (English), ca (Catalan), cs (Czech), da (Danish), de (German), el (Greek), es (Spanish), fi (Finnish), fr (French), it (Italian), ja (Japanese), lt (Lithuanian), nl (Dutch), no (Norwegian), pl (Polish), pt (Portugese), ru (Russian), sk (Slovak), sl (Slovenian), sv (Swedish), tr (Turkish), zh (Chinese) || Sets the default language to open the booking page. (2013 new style booking page only)