When adding parameters of some templates like this:
https://cs.wikipedia.org/wiki/%C5%A0ablona:Citace_elektronick%C3%A9_monografie
it sais "unknown parametr" even the parametr is valid and works afterwords.
This information is confusing.
Version: unspecified
Severity: trivial
Right now, manually adding a parameter that's not described by TemplateData shows a message saying that the parameter is "unknown", which is a little odd if it then seems to work.
There are very many templates where the TemplateData description is incomplete and some parameters are just not documented. Some better description than unknown would be good - perhaphs "undocumented".