Set the page language in Squarespace

1. Open Site Languages (version 7.1) or Language & region (version 7.0) in your site settings.
2. Choose the right language from the Site language dropdown. If there's a Localize website toggle, switch it on.
3. Click Save.
4. Text you wrote yourself stays as it is; this setting controls the built-in text and the language your pages report.

Check it: publish your change, then run a new scan from your dashboard. The issue should drop off the list.