First, set up the Multilingual app
admin/shop/integrations/multilanguage/controlfiled/
This is the way it is on chest 1224
Secondly, you need to understand which system is your main one.
That is, where you create and maintain a product range.
Because this is an important question before working with languages and configuring them.
When the main OneBox, the products must have names in all the languages you use.
If you use Russian and Ukrainian, when switching from one language to another, you will see the corresponding transition in the product card.
Try to do on one card what you see.
After that, you have to decide what to do next.
As for how it should be on OpenCart, it is better to contact their technical support.
As it looks, it is necessary to specify Ukrainian by default, because Russian is used by default.
As far as I know, all the fields are in the same table, you just need to select the language_id parameter:
1 - Russian;
3 - Ukrainian.
Screen 1225 is watching.
But this is not accurate. It might help
Ihor Susiak