Android : how to add multiple lines which are an array of the same parameter in retrofit?

I want to pass an array of the same element, but i want them to be passed as new fields. I want to do something like:

        @POST("/api/userInfo/changeProfileData/")
        void updateProfile(
        @Field("userInfoProfile[languages][0]") String language1,
        @Field("userInfoProfile[languages][1]") String language2,
        Callback<BaseModel<StateModel>> callback);

But the problem is that i don't know the number of elements so i cannot do like above.

I tried to pass a list:

           @Field("userInfoProfile[languages]") List<String> languages

but the value is not valid because i need fields with their index (userInfoProfile[languages][0]).