If you wish to translate words of the advanced product plugin (ex: Inventory Search Fields, Custom Fields, Product Categories ...), please install Loco Translate plugin which can support you to translate them.
- Please go to WP-admin > Plugins > Add new
- Search Loco translate and click the Install button, then click Activate
- You're supposed to go to Loco Translate plugin > Plugins > Advanced Products
- Install your language by clicking on "Install new language"
- Search your words and replace them with the new ones