Make a "job" page more mobile friendly on Wordpress + other small changes

Hi all, I have been building a job portal website with Wordpress. I am almost 100% happy with the web version (besides a few translations that I cannot complete), however on the mobile version there are still some things that needed to change. Changes to be made, web version: For the "Regio" and "Categorie" filter, you can only tick one box at the moment. I want to make it possible that visitors can choose multiple regions or categories at the same time. Translations: "All Regions" need to be translated into "Alle Regio's" "Choose a category" need to be translated into "Categorieën" Mobile version: As you can see on the current mobile version, visitors have to scroll a lot until they actually see the jobs. I want to add a filter button to hide/unhide several options in the job search to make it more mobile friendly to browse through jobs. All the text should take less place in as well, it's too big and not mobile friendly at all. I tried to explain the changes I require with several printscreens in paint. However, I am also open to creative solutions to make it more attractive as well, but it should be mobile friendly and have a professional look in the end. I am looking forward to have a trustworthy partner who can help me with these issues.