How can I get the page or post language when I use wpml? [closed]

From The WPML website:

http://wpml.org/documentation/support/wpml-coding-api/

Language constants

WPML defines the following constants which can be used in the theme:

Constant              Description                                        Example

ICL_LANGUAGE_CODE     Code for the current language                      fr
ICL_LANGUAGE_NAME     Name of current language, in the current language  Français
ICL_LANGUAGE_NAME_EN  Name of the current language name in English       French