You can download the following items as zipped, utf-8 encoded archives:
Glottolog is part of the Linguistic Linked Open Data Cloud. You can request RDF representations of the resources by adding a suitable extension (like '.rdf' or '.n3') in the address bar (e.g. http://glottolog.org/resource/languoid/id/stan1295), or by using content negotiation. Glottolog makes use of popular ontologies such as Dublin Core.
http://glottolog.org/resource/languoid/iso/deu can be used to link to a language when the ISO 639-3 code is known, but the Glottocode is unknown.