| Subject | English | Polish |
| gen. | learn a lesson | dostać nauczkę |
| gen. | learn a lesson from smth | wyciągnąć z czegoś naukę |
| comp., MS | lessons learned | wnioski (A review of best practices, project insights, and client information. As the project team disbands and new projects begin, reviewing the lessons learned lets you record information gathered and generated through the project) |
| gen. | Lessons Learned | wdrożone doświadczenia i wnioski |