feat: strengthen operator template and localized SEO UX

layouts/partials/faq-accordion.html

@@ -4,7 +4,10 @@
        Alpine (when present) layers single-open accordion behaviour on top via
        x-bind:open + the native `toggle` event — never hiding content with
        x-cloak. The FAQPage JSON-LD is emitted separately by schema-jsonld.html. */ -}}
-{{- $faqs := sort .Site.Data.faq "weight" -}}
+{{- $faqKey := printf "faq.%s" .Language.Lang -}}
+{{- $faqs := index .Site.Data $faqKey -}}
+{{- if not $faqs -}}{{- $faqs = .Site.Data.faq -}}{{- end -}}
+{{- $faqs = sort $faqs "weight" -}}
 <div class="mx-auto max-w-3xl divide-y divide-secondary/10 rounded-xl border border-secondary/10" x-data="{ open: null }">
   {{- range $i, $f := $faqs -}}
     <details class="group"