Official name of the exit (posted inside the station + in official GTFS data) is:

name 	Rue de la Loi - Wetstraat
name:fr 	Rue de la Loi
name:nl 	Wetstraat


Changing this into "name:nl=Lex" looks like a mistake to me.

Same for the elevator, which should have no name at all.
https://www.openstreetmap.org/node/7916545561