WordPress Multilingual Website Update + Referral Campaign Pages

I have a fully built and live WordPress website created with Elementor. I am not looking for a redesign. I need a freelancer to make several specific updates while keeping the current visual style, structure, logo proportions, and responsive behavior intact.

The website is currently live in English only. Polylang has already been installed, and English, Czech, and Russian have been added in the WordPress backend, but the multilingual/header changes have NOT been published yet. The current live website should therefore be treated as the reference for the existing design and layout.

I need the following work completed:

Correctly finalize the EN / CZ / RU multilingual setup
Keep English as the default language
Add a clean EN | CZ | RU language switcher in the header
Create the Czech and Russian language versions
Make sure the existing header, logo, navigation and responsive layout remain visually correct on desktop, tablet and mobile

I also need a new 20,000 CZK referral campaign block added to the Home page. The campaign offers a reward for a successful property referral. The block must have separate English, Czech and Russian versions. I will provide the exact copy, visuals, WhatsApp contact details and approved campaign wording.

Please also create three separate Terms & Conditions pages:

English
Czech
Russian

Each language version of the homepage campaign block must link to the corresponding Terms & Conditions page.

Important requirements:

Do not redesign the existing website
Use the current live English website as the visual reference
Do not publish incomplete language versions
Do not distort or unnecessarily change the existing logo
Do not break existing menus, pages, links, forms or responsive behavior
Multilingual implementation must work correctly with WordPress + Elementor + Polylang
Test the final result on desktop and mobile before completion

IMPORTANT: SHARE UR WORK (1 OR 2)

I will provide the final EN / CZ / RU campaign copy and Terms & Conditions text once the project starts.