Nintendo and Lego are on the same level when it comes to sue people for trademark violations. There are several cease-and-desist orders against YouTubers for calling no-name bricks legos.
Its like a whole country called spaghetti "basgetti" as kids and just went with it.
Though I don’t think throwing an “s” on a word to make it plural, even if technically incorrect, is on the same level as “basgetti”. Adding an “s” to words to make them plural, is generally a good rule, there are just some exceptions, and not that many people are deep enough into Lego to know it’s one of those exceptions.
"leg godt" = "play good"
---
What your word of choice? "Miniature building blocks"?
Copies of old LEGO games floating around online are effectively just free LEGO advertising, so the situation may be quite different here.
From my experience they also have quality as a moat. No budget manufacturers seems to be getting the tolerances Lego is getting. There could be producers that are getting there though, but I don't know them.
Well I didn't until now