|-
| lang ||en (English), ar (Arabic), bg (Bulgarian), ca (Catalan), hr (Croatian), cs (Czech), da (Danish), de (German), el (Greek), es (Spanish), et (Estonian), fi (Finnish), fr (French), he (Hebrew), hu (Hungarian), id (Indonesian - Bahasa Indonesia), it (Italian), ja (Japanese), lt (Lithuanian), mn (Mongolian), my (Burmese), nl (Dutch), no (Norwegian), pl (Polish), pt (Portuguese), ro (Romanian), ru (Russian), sk (Slovak), sl (Slovenian), sr (Serbian), sv (Swedish), th (Thai), tr (Turkish), zh (Chinese) || Sets the default language to open the booking page. (2013 new style booking page only)
|-