i18n language switcher don't show on default lang I'm using Drupal 7 and Clean theme. And my site have 3 languages. Using i18n module for this features. Everything is working... 

Language Switcher block is active, showing on 2 languages. But, when click my site default language, don't show this block. 

How can i solve this?
There is an option under language switcher block configuration.You have to select all the language checkbox to display language switcher block in all languages.