What I have in mind is more loosely defined than LL(k) and in a way more restrictive than a general LL(k) grammar, but LL(k) is probably a good way to formally capture something close to what I had in mind. I try to avoid using the term "almost regular" as it is imprecise. I only used it since it was relevant to the context and I'd heard Rob Pike describe Go as having almost regular syntax several times.