Are You planning to add a finish layer?
I mean the 1-2 cm thick finish over the reinf. concrete structure?
I noticed that the plan was object for the prefabricated stairs, but it would be nice if the on site made concrete stairs were supported?
The single line balustrade would be nice too - that would be a good thing for permit stage design.
If You plan making the stair object international - the description must be configurable (like the stairs in INT library)
Nice thing would be a description in section (of course can be done via label as well)
One more thing: The section line - it would be nice if the diagonal option was possible as well as the current perpendicular to the stair line.
As for the translation - It can be easier if done inside UI not parameters list > the language can be switchable (online) much easier way.
If the parameters list was to be multilingual - the parameters number is multiplied by the no of languages factor unfortunately
(I could help You with the UI if You needed)