Senior WordPress Expert Required for Multilingual Website Implementation

We are looking for a highly experienced WordPress specialist to assist our in-house WordPress developer with a multilingual website project. Our website is already fully translated by professional translators, and all SEO translations have been completed. The content itself is ready. What we need is an experienced WordPress expert who can work alongside our in-house developer to help build and refine the technical translation mechanism that will allow us to deploy and manage the various language versions of the website efficiently. We are specifically looking for someone who has significant experience with multilingual WordPress websites and understands how to properly implement translation systems, language switching, multilingual SEO considerations, and the overall technical structure required to make a large multilingual website function smoothly. Our developer has already started the work and knows exactly what needs to be done. We are looking for an extra pair of experienced hands to help accelerate the process and provide technical input where needed. The budget for this project is USD 200.