Its Lego-its not a word, its the name of the product:)
In French, train is a cognate and is said and spelled the same as in English, train.
Train de balle.
Maître de train
a person who is good with legos and can build a lego train
ou est le train (pronunciation)
The Austin train station is 'la gare d'Austin' in French.
Lego is a brand, making it still be Lego in French.
eBay, Amazon or the Lego website are the best places to buy Lego train sets.
A la gare.
No
est en train d'explorer