Joker is a strong option for learners who already feel comfortable with English and want a more demanding challenge. Some parts may require more focus, but the main story remains easy to follow. Learners will hear plenty of useful natural English, but some lines may still require a second listen. Also, crime scenes may bring in words related to investigations, police or legal vocabulary. At around 65 words per minute, the rhythm of the dialogue is manageable and easy to follow. The community has given Joker an English difficulty rating of 5.5/10, so a B1/B2 level is recommended to learn from it effectively and enjoy the content.