Searchable attribute is not working on refinementList

Hey team, i am new to algolia and stuck with a task.
I have added a refineMentList with the below settings

and also make the parameter searchable in the primary index

I am getting this result in the front-end

but if I search for something then the search won’t work.
I have around 27-28 values in the “language_names” parameter.

Note: I am not using custom UI

Any help or suggestion would be really appreciated.