weglot won't translate the hubspot form embedded on our webflow site

If you go the one-form-per-language route, set the language option on each form in HubSpot as well. That's what controls the built-in text like the required field and invalid email messages, which otherwise stay in English even when your own labels are translated.

Check how the form actually renders first. Inspect it in dev tools: if it's sitting inside an iframe, Weglot can't touch it, because the content is loaded from HubSpot's domain and not part of your page. If it's injected into the page by HubSpot's script instead, it's loading after Weglot has already done its pass. Weglot has a setting for dynamic elements where you can add the form's CSS selector so it gets picked up later. honestly the cleanest fix we found was just building a separate form per language in HubSpot and swapping the embed on each language version of the page. labels and error messages are then exactly what you want, and you can tell which language a lead came from.