language_change：这是洋泾浜插件什么允许更改默认语言。

This plugin change the default language in Linux systems. Developers: The working of the plugin is simple. It get the posibles languages from /usr/lib/locale/. It allows to users select the languages they want. Known errors: A plugin works in execution time. Then, the plugin init in default language. Inmediately it get the select language and turn to it. TODO: I would like if you teach me how to program it with signals. I would like it changed the default language without reboot pidin. It could be added to the code of pidgin. I thanks if you correct something what it was wrong. My english is poor. Because of that, you can correct me too.