If this gets enough of an official stamp of approval from the EU, then access to enough tokens in smaller languages may not be a big issue. For that matter, even for OpenAI it's likely largely down to how much they care to negotiate access.

E.g. for Norwegian the Norwegian national library and state archives sits on at least a couple of magnitudes more of digitized material in Norwegian than OpenAI appears to have found Norwegian material for GPT3.

How much exactly would depend on willingness to give access to still in-Copyright data, but it'd still be far more even if you only give access to what is currently on their website.

And ChatGPT is well versed enough in Norwegian even without that to be able to convincingly use several regional dialects that are rarely used in writing (I've tested several) so it won't take all that much.

But frankly being able to ask it about the contents of these archives would be amazing because they include a couple of centuries of newspapers and almost every book ever published in Norwegian.

The level of digitization will differ, and Norway was early with that, but most countries have depositary requirements for printed materials, and countries with smaller languages like are often more anal about them...