1. Prepare the Resource Files: Create separate resource files for each supported language. These files will contain translated strings, layouts, and other resources specific to each language.
2. Resource File Structure: Place the resource files in the appropriate folders within the “res” directory of your Android project. The folder names should follow the language and region codes defined by ISO 639-1 and ISO 3166-1 alpha-2 standards. For example, “values-es” for Spanish, “values-fr” for French, and so on.
3. String Localization: Extract all the strings used in your application into resource files. Create a “strings.xml” file for each language, and place it in the respective language-specific resource folder. In these files, replace the hard-coded strings with their corresponding localized translations.
4. Layout Localization: If your layout files contain language-specific content, create separate layout files for each language. Place these layout files in the appropriate language-specific resource folders. For example, “activity_main.xml” for the default language, and “activity_main.xml” inside “layout-fr” for French.
5. Handling Locale Change: To handle locale changes dynamically, you can create a mechanism to set the desired language based on user preferences. This can be done using shared preferences or other configuration options. When the language is changed, you need to update the app’s locale and refresh the UI to reflect the selected language.
6. Retrieving Localized Resources: Access the localized resources in your code using Android’s resource management APIs. For example, you can use getString() to retrieve localized strings, or getResources().getConfiguration().locale to get the current locale of the device.
7. Testing and Localization Management: Test your application thoroughly to ensure that all the localized resources are displayed correctly and that the application behaves as expected in different languages. Additionally, consider using localization management tools or services to streamline the translation process and manage your localized resources efficiently.

Also u can take reference from documentation –
https://developer.android.com/training/basics/supporting-devices/languages#:~:text=You%20can%20provide%20support%20for,and%20culture%20of%20your%20users.