If you're experiencing an issue where Teuida is stuck at the vocabulary section in Day 5, Unit 1, here are some steps you can take to troubleshoot and resolve the problem:

1. Force Close and Restart the App:
- Close the Teuida app completely.
- On your Android device, go to "Settings" > "Apps" > "Teuida".
- Tap "Force Stop" and then reopen the app.

2. Check for App Updates:
- Open the Google Play Store.
- Search for "Teuida" and check if there’s an update available. Keeping the app updated can fix bugs and performance issues.

3. Clear App Cache:
- Go to "Settings" > "Apps" > "Teuida".
- Tap on "Storage" and then select "Clear Cache". This can resolve issues related to storing outdated data.

4. Reinstall the App:
- Uninstall Teuida from your device.
- Go to the Google Play Store, reinstall the app, and log back into your account. This often resolves issues arising from corrupted files.

5. Reset Progress (if applicable):
- If the issue persists, consider resetting your progress in the app if there’s an option available. This can resolve stuck progress in lessons.

6. Contact Support:
- If none of the above steps work, reach out to Teuida's support team. They might have specific solutions for this issue. You can typically find support contact information within the app or on their official website.

7. Check Online Forums:
- Visit forums like Reddit where users discuss similar issues. For instance, you might find insights from others who have experienced the same problem and find possible fixes discussed there - learn more - learn more.

Following these steps should help you resolve the issue of being stuck on vocabulary in Teuida.