"I reckon this is even the case when using it as an interactive encyclopedia".

Yes, that is my experience. I have done some C# projects recently, a language I am not familiar with. I used the interactive encylopedia method, "wrote" a decent amount of code myself, but several thousand lines of production code later, I don't I know C# any better than when I started.

OTOH, it seems that LLMs are very good at compiling pseudocode into C#. And I have always been good at reading code, even in unfamiliar languages, so it all works pretty well.

I think I have always worked in pseudocode inside my head. So with LLMs, I don't need to know any programming languages!