Localization is CRUDBooster feature if you want to change the language CRUDBooster.
By default CRUDBooster still using the English language
You can add your own words to create a file on:
You can create a folder eg id (in the lang folder), and then copy and paste the file crudbooster.php.
You just replace all the English to the language you want.
Then do not forget to change the locale on the setting app.php file in accordance with folder names you just created.