HowTo/Scenery/username
From TrainzOnline
username
This tag is required.
Data type is string.
This is the name of the object as it appears in surveyor additions window. Make the name descriptive but not too long. I would suggest no longer that 20 characters.
For other languages, there is a series of username-xx tags that can be added in addition to the default username tag. xx is a 2-letter code for the country, e.g. username-de for German (Deutsch), username-jp for Japanese etc. (Thanks to Dinorius_Redundicus for this info)