A lot of people in Poland use the DJI RC RM330 controller.  Unfortunately, the controller does not support the Polish language.  The DJI Fly app for IOS and Android phones supports Polish.  I am writing on behalf of myself and all users of the Dji RC RM330 controller in Poland to add the Polish language to the controller menu in the next update.
Kind regards

Hi there, we apologize for the inconvenience this has caused. Based on the firmware version V01.00.0300, at the moment the DJI RC supports Chinese, Traditional Chinese, German, English,  Spanish, French, Italian, Nederlands, Portuguese, Korean,  Turkish, Russian, Vietnamese, Japanese, and Thai. Rest assured we have taken this as a suggestion and passed it to our relevant team for potential. In the meantime, please let us know if you have other DJI concerns. We thank you for your support.

Thank you for your answer, we hope that the Polish language will be introduced to the RC RM 330 controller system, we really care about it.  It is not fair that the same application in the Android and IOS smartphone supports the Polish language.  Drones are not cheap, so this price should include support for languages ​​from Eastern European countries.

djiuser_ElmaQq2EKsPa Posted at 4-29 04:35
Thank you for your answer, we hope that the Polish language will be introduced to the RC RM 330 controller system, we really care about it.  It is not fair that the same application in the Android and IOS smartphone supports the Polish language.  Drones are not cheap, so this price should include support for languages ​​from Eastern European countries.

We value customers who provide their feedback. Rest assured that we'll communicate it with the respective team for its potential. We are grateful for sharing your opinions with us. Thank you for choosing DJI.