May 10th, 2026
Consent banner language for domains registered before 20 September 2025
Hi there,
If your Consent Studio site was registered before 20 September 2025, the consent banner was previously detecting the visitor's language only from their browser, ignoring the page's <html lang> attribute.
As per our upcoming change, these sites will start using the same hybrid detection of all later registered domains: the banner first reads the page's <html lang> attribute (for example, <html lang="nl-NL">), and falls back to the visitor's primary browser language when the attribute isn't set.
This matches the behaviour described under Banner → Behaviour which before only applied to domains that were registered later.
No action is required on your side. The change applies automatically. Just make sure the languages you want to support are enabled under your domain's language settings, and that your pages set the appropriate <html lang> attribute when relevant.
If you have any questions or run into anything unexpected, our support team is happy to help.
The Consent Studio team