This thread is resolved. Here is a description of the problem and solution.
Problem: Posts sent to the Advanced Translation Editor do not display as translated in the front end, even if they appear as translated in the backend.
Solution: In the pages there is a block returning a shortcode
[vc_btn title= " " color= "danger " align= "center " i_icon_fontawesome= "fa fa-file-text " add_icon= "true "]
Since the shortcode is empty, it blocked the pages to be displayed correctly.
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