The LRE Metadata Application profile supports the use of multilingual vocabularies. Multilingual controlled vocabularies make it possible to automate translation work for learning resources that have been indexed in one language. Therefore, the use of multilingual vocabularies enhances interoperability.
The most extensive of these multilingual vocabularies is the LRE Thesaurus (formerly known as ETB Thesaurus). This vocabulary describes the subject of a learning resource and is continuously used in the European Schoolnet’s services.