This thread is resolved. Here is a description of the problem and solution.
Problem:page not found error for translation
Solution:The translated page is showing page not found error. It works after the following steps.
a) Visit WPML>>Languages>>Language URL format, resave the settings
b) Visit Settings>>Permalinks, resave the settings
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This topic is split from https://wpml.org/forums/topic/adding-a-new-language-kazakh/