If you want to translate the plugin’s own interface text (button labels, messages, field names), use Loco Translate.
- Install and activate the Loco Translate plugin (available free on WordPress.org).
- Go to: Loco Translate → Plugins
- Find WP 3D Configurator in the list.
- Click New Language and select your target language.
- Translate each string and save.
Loco Translate works with the plugin’s built-in .pot file and does not require any code changes.
TIP: For simple label and button text changes (without creating a full translation), you can use Text Strings instead. See: Global Settings → Text Strings.