Hi grzegorz.gladysz,

1. I relocated translation file to System https://prnt.sc/5tkfmljvE_yW

2. Make sure you set language to User profile

If you have a quick minute we always appreciate a 5-star rating on our theme!

https://themeforest.net/item/woodmart-woocommerce-wordpress-theme/reviews/20264492

Your feedback is the motivation to improve our work and services.

Regards,