I imported most of my products into Odoo using an Excel import. I have enabled two English language variants: UK (en_GB) and US (en_US). However, I have noticed inconsistencies in the database: some products have both en_GB and en_US versions, while others only have en_US.

When I attempt to update a product name via an API call, it only updates the en_US version. If a product has an en_GB translation, the UI continues to display that instead of the updated en_US value.

Questions:

1. Why did this issue occur in the first place—why do some products have both translations while others only have en_US?
2. How can I ensure that my API call updates both en_GB and en_US versions?
3. Is there a configuration setting that forces Odoo to display en_US if an en_GB translation is missing or outdated?

Any insights or solutions would be greatly appreciated!