Rather than having to search through Wikidata:Glossary , interface messages, help pages, Special:SpecialPages, Special:AllMessages, it would be helpful to have a special page (e.g. Special:WikibaseTerminology) that displays translations of key terms on a single page: English on one side, current interface language on the other. This makes it easier for those using it in several languages.
Terms in the Wikidata:Glossary could be a good start: item, property, entity, label, description, title, qualifier, claim, statement, etc.
Actual text would be loaded from available interface messages.
The list of system message to be read could be included in the configuration.