When a user visits the single question page Triggers the language change from the dropdown

Hi
We have one centralized question forum for all languages. The site default language is selected as English. When a user visits a single question page from another language (Nonother than English) that triggers the language change to default.
can we have the view of the single question page for other languages without trigger the language change?
We are using Polylang as the Multilanguage plugin and we have DW Q&A Pro version
Go to this URL https://www.selbl.talliance.com/zh/%e5%88%86%e4%ba%ab%e5%9b%ad%e5%9c%b0/
and when you open a single view question, you can see the site language change from the header menu
We appreciate it if you can help.