This is something outside my touch-up. The line sections are already part of a route that was already there. I only named the already existing route.

I just took the name of the line that it was already part of on OSM for the Taajamajuna 723. For other line, in absence of names, I just added the two endpoint names of the line. For other countries, the naming and referencing of the lines is more accurate

Hello! Sorry this was unintentional. I'll fix it. Thanks ;)

Dear rle32795,
using the service name for a line, in absence of a reference number of the line, is commonly used in OSM. The majority of the railways in this databse has this formatting and so I'm sticking to it. If you know where I can get the reference number of the line, please let me know :)