WordPress Expert: PHP Upgrade, Regina Theme Update, Speed, Multilingual & SEO Fixes

We are a healthcare company in Angola that runs eight small Clínicas Vida medical units. Our corporate website runs on WordPress with the Regina theme. We need an experienced WordPress specialist to bring it up to date, make it secure and fast, and fix its indexing problems. HOSTING The site is hosted on Cloudways (managed hosting). You will get Cloudways team access with limited permissions to the application, so you can create a staging copy, change the PHP version and configure caching (Breeze, Varnish, Redis, and others if needed). SCOPE OF WORK 1. PHP upgrade (security-critical) The site must move to a patched PHP version (8.4.27+ or 8.3.36+) because of the critical PHP2Shell vulnerabilities announced on 21 October 2026. A previous attempt to upgrade PHP broke the site, so you will need to find and fix whatever is incompatible: the theme, plugins or custom code. 2. Regina theme update Update the theme to its latest version, or recommend a well-supported alternative if Regina is no longer maintained. Keep the current design, layout and content. 3. Missing characters and icons Several icons and characters show up as empty squares (for example, in the "Serviços" section and on the "Ler mais" buttons). This looks like an icon font or encoding problem and needs fixing across the whole site. 4. Speed optimisation We currently fail Google Core Web Vitals. - Mobile: Performance 70, LCP 4.3 s, FCP 4.3 s, TTFB 1.7 s - Desktop: Performance 88, LCP 3.3 s, TTFB 1.0 s Goal: pass Core Web Vitals on mobile and desktop (LCP under 2.5 s), plus clear improvements in Accessibility (currently 65/69) and SEO (85). 5. English version Set up a bilingual site (Portuguese as the main language, English as the second) using WPML,