This site has no analytics, no advertising, and no third-party embeds. Nothing you do here is sent anywhere, because there is nowhere for it to be sent.
Two things are stored in your browser, both only when you ask for them:
NEXT_LOCALE, a cookie written when you choose a language with the EN | PT switch, so the next visit opens in the language you picked.theme, alocalStorageentry written when you choose light, dark or system, so the page does not open in the wrong one.
Neither is read by anyone but this site, and neither identifies you. If you never touch those two controls, nothing is written at all.
Removing them
Clearing site data in your browser removes both. In Chrome and Edge that is under Settings → Privacy → Cookies and site data; in Firefox, Settings → Privacy & Security → Cookies and Site Data; in Safari, Settings → Privacy → Manage Website Data.
Hosting
Pages are served by Vercel, which records requests in its own logs as any web host does.