Firstly go to the profile option and there choose the edit profile option from the top after that click to view more option then the second last option is 'chage language ' click on it and choose which ever language you want

To study in Hindi on this app, you can follow these steps:

1. Selecting the Language
- Open the app and navigate to the settings or preferences section.
- Look for the language option and select Hindi as your preferred language for studying.

2. Exploring the Content
- Once you have set Hindi as the language, you can start exploring the content available in Hindi.
- Look for the Class 9 category and browse through the subjects and topics available in Hindi.

3. Subject Selection
- Choose the subject you want to study in Hindi, such as Hindi itself, English, Mathematics, Science, Social Science, etc.
- Click on the subject to access the study material available in Hindi.

4. Study Material and Resources
- The app provides various study materials and resources for each subject.
- Look for textbooks, notes, sample papers, previous year question papers, and other relevant resources available in Hindi.

5. Video Lectures and Explanations
- The app may also offer video lectures and explanations in Hindi for better understanding.
- Look for video tutorials, animated lessons, or interactive sessions in Hindi to enhance your learning experience.

6. Practice and Assessment
- Practice is crucial for better understanding and mastery of any subject.
- Look for practice questions, quizzes, and assessments available in Hindi.
- Solve them to assess your knowledge and identify areas that require improvement.

7. Doubt Clearing and Community Support
- If you have any doubts or questions, you can use the app's doubt clearing feature or community support.
- Post your queries in Hindi and seek help from fellow learners or educators.

8. Progress Tracking
- The app may have a feature to track your progress and provide insights into your performance.
- Monitor your progress regularly to stay motivated and identify areas where you need to focus more.

By following these steps, you can effectively study in Hindi using this app. Remember to utilize all the available resources and engage in regular practice to enhance your learning experience.