It's definitely not Legi, this isn't Italian or Latin. They're from Denmark, anyone speak Danish?
Legoes my eggoes, biotch.

This is why the plural of fish is fishs.

And the plural of tomato is tomati.

The plural of Lego is obviously Lego but if for some reason you have a pseudo semantic or grammatical objection to it you
can conveniently get round this by saying Lego bits [ not bricks or blocks because not all Lego qualifies as either of these ]
This derail has to stop now because it is detracting from the actual thread topic which is way more interesting and serious