I'd heard this from another source a little while ago, but it is official that both sorghum and teff are considered among the millets, or if you prefer, the grains that will be promoted during the International Year of Millets. I don't have an online reference for teff, but here's one for sorghum (with thx to Nate Blum): https://www.morningagclips.com/nebraska-grain-sorghum-board-commends-the-uni... Just what counts as a "millet" is often a matter of discussion, with some including or not including sorghum and/or teff. We have suggested that "millets' is a kind of folk taxonomy - it is clearly not a clear botanical category - which usefully serves to identify a class of grains. For the International Year of Millets, the FAO is apparently using a definition of small dryland grains in the Poaceae (grass) family. More on that later. Don Don Osborn, PhD (East Lansing, MI, US - +1 202-621-3911) North American Millets Alliance don@milletsalliance.org