Polylang is not working with per language basis Settings

I was trying to configure simply static with polylang for per language settings, but settings is overwritten while I am changing for other language , only last one get saved, per language settings is not working . Like shown in documentation for WPML . Can you please help me out , how per language settings and generator will work on polylang, My polylang url is on subdomain per language . Thanks in advance.