Cookie policy
Last updated: 20 September 2026
1. What a cookie is
A cookie is a small file the site stores in your browser. Some are strictly necessary for the site to work; others measure usage or tell us which advert brought you here, and are only installed if you accept them.
2. Cookies we use
| Cookie | Purpose | Type | Lifetime |
|---|---|---|---|
| sl_sess | Keeps you signed in | Essential | 30 days |
| sl_lang | Remembers the language you chose | Essential | 1 year |
| sl_consent | Stores your cookie decision | Essential | 180 days |
| sl_a | Internal, aggregated page-view measurement | Analytics, consent required | 180 days |
| sl_utm | Remembers the campaign you arrived through | Advertising, consent required | 90 days |
| _fbp and _fbc | Meta pixel: measures whether a Facebook or Instagram advert ended in a sign-up | Third-party advertising (Meta Platforms Ireland Ltd.), consent required | 90 days |
If you accept all, we load the Meta pixel and tell Meta about the actions that count as a conversion (free sign-up, starting a level, purchase), with your email address hashed irreversibly so that Meta can match it to your account if you have one. That involves a transfer of data to Meta Platforms Ireland Ltd. If you choose essential only, nothing from Meta is loaded, nothing is sent, and the site works exactly the same. Typefaces and every other asset are always served from our own domain.
3. How consent is requested
On your first visit a notice appears with two clear options: accept all, or essential only. Until you choose “Accept all”, no analytics or advertising cookie is installed, the Meta pixel is not loaded and no visit is recorded.
4. How to withdraw or change consent
You can change your choice at any time in the preferences block further down this page. Switching to “essential only” deletes the analytics and advertising cookies immediately and we stop sending anything to Meta. You can also clear cookies from your browser settings.
5. More information
The processing of data linked to these cookies is described in the privacy policy.
Your preferences
Current status of your consent: you have not chosen yet; for now only essential cookies are used.