If you wish to upgrade your professional skills abroad, you can enroll for Erasmus+ traineeship mobility throughout your doctoral studies (as long as enrolment is open – possibly even in your last year of curriculum). This is the so-called long-term mobility which means it involves at least 60 days spent at a host institution outside Poland. If you wish to participate, please find a host institution on your own (it can, but does not have to, be an university) and agree upon your traineeship activities (sign the LAT) with your supervisor and the host institution.
Please find more information under the link below (perhaps download the Rules of enrollment): ERASMUS+ TRAINEESHIPS 2023/2024 (lodz.pl)
The enrollment has started on 5 July and it will last until funds are exhausted. You can check availability by calling the UL International Relations Office (42 635 40 36).