Helsinki’s new line 13 is very similar to the existing line 15, which is branded as “light rail”. Why is 13 not being called “light rail”? It will soon even use the same trams as line 15.
The video is in finnish, turn on subtitles if you don’t speak the language :D
There is a category called tram-train.
Here where I live light rail uses similar signalling control systems to normal rail, they are just not connected to the national network. From that definition, this would be called a tram here.