APK projects

Yes, it is technically possible to reverse engineer a Google Play app, change its user interface language from English to Bengali, and keep the app functionality the same

—but there are significant legal, ethical, and technical considerations you must understand before proceeding:


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1. Legal and Ethical Considerations

Most apps are protected by copyright and terms of service. Reverse engineering or modifying an app without permission likely violates:

Google Play's policies

The app's own license

International copyright law


You should only attempt this on:

An app you personally developed

An open-source app

An app where you have explicit permission from the developer




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2. Technical Steps (for Educational or Permitted Use Only)

If you have the right to modify the app, here is a general process:

a. Extract the APK

Use tools like APK Extractor on Android or adb pull if you have USB debugging enabled.


b. Decompile the APK

Use APKTool or JADX:

apktool d app.apk (for full resource extraction)

jadx-gui (for Java code viewing)



c. Locate Strings and Resources

Find language resources in res/values/strings.xml (English)

Add or modify res/values-bn/strings.xml (Bengali)

Translate the strings appropriately using Unicode Bengali.


d. Recompile and Sign the APK

Rebuild: apktool b app_folder -o app-modified.apk

Sign the APK with a debug or custom keystore:

jarsigner -verbose -keystore my-release-key.jks app-modified.apk alias_name


e. Install and Test

Install the modified APK via adb install app-modified.apk

Set the device language to Bengali or implement language toggling inside the app.



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3. Alternative Suggestion (If Translation is Your Goal)

If your purpose is only to localize the app to Bengali for wider use (not resell or distribute modified versions):

Contact the developer and offer to contribute translations.

Many developers use localization platforms (e.g., Crowdin, POEditor) and appreciate volunteer contributions.



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Would you like help with a sample app or creating Bengali language resources for an open-source app?


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