Support for the optional tags property was added in furniture properties files of Sweet Home 3D 3.6, along with the information, creationDate, grade properties.
A tags# property can contain comma separated words or expressions, which are used in the search engine of the catalog. You can already try it if you want to, and send me new Finnish PluginFurnitureCatalog_fi.properties files if you want [:)]
I shall do it in the English and French version too...