Relationship store data

Hi I'm new to Laravel so need little bit help... I have 3 tables with eloquent relationship. Reading data works great but now I'm trying to store new data. In form there are data I want to store into 3 tables. My questions are:

Should I put validation for whole form into PageRequest file? In my form I have inputs for 3 language version and name for input looks like title[en] / title[de] / title[sk]. Whats the best solution to save this inputs with laravel?

Relationship is hasOne and belongsTo...

My store function:

public function store(Requests\PageRequest $request)
    {
        $input = $request->except('image');
        $page = Page::create($input);
        
        Flash::success(trans('page.messageNewPage', ['title' => $page->title[sk]]));
        return redirect('admin/page/sections');
    }