If you're only reading this wiki
We have some the usual web servers logs.
They could mainly be used to debug errors or compute site statistics.
We don't have any other use of your personal data.
If you're writing
Each of your wiki modification will be fully logged with IP or username, date, etc.
These modifications are on Creative Commons Attribution license. We'll keep them forever. That includes anything you write, main namespace, user namespace or talk pages.