Hello.

I rechecked the keys and as I saw they were added in 12.0.1 - 13.0.0 update of the Ads module. It's hard to say how the update was applied and what may happen whey it was applied.

In the current version of Ads module they present in the default languages. So, if you didn't modify any Ads related keys via Studio -> Polyglot then you may go to Studio -> Developer -> Polyglot and reset the keys for Ads module.