Button system for language learning app

I appreciate the color theme you chose for your buttons and how you've demonstrated compliance with WCAG requirements. The details about the buttons are well-articulated, and the presentation of your work is catchy and easy to follow.

However, I was left wondering why there are so many primary button types. Additionally, your button system should include tertiary buttons and system buttons (for example, for destructive actions like cancel). These elements are crucial and their absence could lead to confusion when applied to an interface.

With these issues given more thought, your work would stand out!