Cookie policy
A cookie is a piece of data a site stores in your browser so it can remember something from one page to the next.
This site stores none.
Check right now: open the developer tools, Application → Cookies, and look at what is there for this domain.
How the language works without a cookie
From the address. / is Spanish and /en/… is English, and the language button
changes the URL. There is nothing to remember between pages.
Until July 2026 this site wrote a NEXT_LOCALE cookie holding the language.
Nothing read it, so it is gone.
The analytics use no cookies either
I do measure visits, because I want to know what gets read and what does not. I use Matomo on a server of my own, not a third-party service that makes its living from the data.
It is configured not to write cookies (disableCookies), so no identifier is
left in your browser. Nothing follows you from one site to another, and your
visits here are never joined up with what you do anywhere else.
What it does do, with the exact detail: to work out whether the page you just opened continues the visit you started five minutes ago or is a new visit, Matomo computes a fingerprint on the server from your IP address and your user-agent string — that is, from the same things your browser sends any site when it asks for a page. The window in which it uses that is 30 minutes. Past that it stops counting you as the same person: come back tomorrow and Matomo records a new visit and does not flag it as returning.
That is what the system does, which is worth not confusing with what would be impossible. Each visit's fingerprint is stored, so two records sharing one could be compared afterwards. Nobody does that here and nothing is set up to, but telling you it is impossible would go further than I can support.
So the fingerprint is not there to follow you. It is there to avoid counting you five times for reading five pages in a row.
The IP address is stored with its last two octets masked: arrive from
203.0.113.47 and what is kept is 203.0.0.0. That does not make it anonymous,
and I am not going to tell you it does: it remains personal data and is treated
as such.
Theme preference
When a page loads, the site checks the colour preference reported by your
browser (prefers-color-scheme) to show the light or dark theme. If you choose
one from the control in the masthead, it stores only the theme key in
localStorage, with the value light or dark, and reads it on later visits to
keep your choice.
That preference stays in your browser: it is not sent to the server, combined with other data or used for measurement, advertising or profiling. You can remove it by clearing this site's data in your browser.
Why there is no banner
Plainly, because the reasoning matters more than the conclusion.
Consent is required for storing information on your device or reading what is already there, except when it is strictly necessary to provide a function you requested. This site sets no cookies: zero. The theme preference described above implements an explicit interface choice and is limited to remembering it, so I treat it as exempt from prior consent. The tracker, meanwhile, is configured not to look up your screen resolution, your plugins or your browser's extended data.
What is left is what your browser sends to any server when it asks for a page: the IP address, stored truncated, and the user-agent string. That is what counts the visit, and little else. No advertising, no profiling, nothing that leaves here.
On that basis I consider this site's audience measurement not to require your prior consent. That is my assessment as the controller, not anyone's certification: if you think I have it wrong, write to me and we will look at it.
If I ever add something that does need consent, the banner will appear and this page will say so first.
If you see cookies stored for this domain
Until July 2026 this domain served a WordPress site with Google Analytics and other add-ons. If you visited back then, your browser may still be holding cookies from that era. Nothing sets them any more, but they stay stored until you clear them.
To clear a site's cookies: