Domain names are an essential and ubiquitous part of the Internet. At the layers that are visible to people (browsers, email, search results, links), they provide multi-layered visual and linguistic clues about the sort of content, organisations, reliability will be found at various online destinations. But domain names are also at work in layers of the Internet that are not visible to users, such as digital certificates, or policy data carried in domain name headers. These contribute to the seamless running of the Internet. A multilingual domain name environment is the only way to ensure that each end user has the same rights to access content in their own language, and to experience the Internet without constraints and barriers.