Hi,
1. Yes. Enter a translation key in the field and then add that translation key as a translation override and that should do it.
2. Sure. With Falang, when you edit a category, you can use the flags there to translate the category content.
3. This area only appears for custom fields of the tables "item", "product", "category", and "order".
- "item" & "product" : the field will be displayed for the product if the product is in at least one of the categories of the field.
- "category" : the field will be displayed for the category if the category is a child of the category of the field.
- "order" : the field will be displayed on the checkout if at least one product in the cart is in at least one of the categories of the field.