Hi there! I understand you're having an issue where your headphones connected with the AICOOL Market app are not speaking English despite setting the output language to English. Let's work on figuring this out together.

To start, could you tell me a bit more about your setup?
- What specific model of headphones are you using?
- Are they connected via Bluetooth or wired?
- Have you verified that the app’s settings for input and output languages are correctly set to English?
- Do the headphones produce any sound at all, or is it only the language output that’s a problem?
- Have you tried restarting the headphones or the app yet?

Once I have this info, I can guide you step-by-step. Meanwhile, here’s a general approach based on common issues with AICOOL Market app and translation earbuds:

1. Check app language settings: Confirm both input and output languages are set to English in the app. Sometimes the input and output can be set differently, causing confusion.

2. Restart devices: Turn off your headphones, close the AICOOL Market app entirely, then restart your phone and headphones before trying again.

3. Update firmware and app: Check if there’s an update for your headphones’ firmware or the AICOOL Market app on your Android device. Outdated software can cause issues.

4. Rebind the device: Within the app, go to “My” > “Settings” > “Login” and try unbinding and then rebinding the headphones, as the device binding sometimes affects functionality3.

5. App permissions: Make sure the app has microphone and Bluetooth permissions on your Android 10 device.

If these don’t help, there might be a specific issue with the app's recognition or the headphone firmware — sometimes certain batches have language output bugs.

Would you like me to walk you through any of these steps in detail? Or do you have info from your side to share? I’m here to help you get this solved!