This is almost always about how that text was built in Webflow, not about the page selection. A Webflow page can contain text in five different "homes," and only some of them belong to the page itself:
Plain text elements on the page → included in the page's work unit. ✅
Components (navbar, menu, footer, pricing cards…) → the text belongs to the component's definition, not the page. Translate it through the Components section — once translated, it updates everywhere the component appears. See "How do I translate navigation menus" below.
CMS-driven sections (a list of posts, testimonials, menu entries stored as CMS items) → the text belongs to the CMS collection. Translate that collection in the Collections section.
HTML embeds / custom code → not scannable via Webflow's API. These need manual handling.
Images / SVGs containing text, and alt text → not scanned.
What to do: open the page in the Webflow Designer and click the "missing" element. The Designer shows you immediately whether it's a component instance (green outline / component panel), a CMS-bound element, or an embed. That tells you which section of the connector covers it — or whether it's out of scope and needs a manual step.