Development of Proto-Anglish that was used in First Federation times (at the time it was still called "English"). Derived languages are still common throughout much of the Middle Regions and even some of the Outer Volumes - many modified beyond recognition (and incomprehensible to an Anglic speaker). No longer used in the Inner Sphere.
High Anglish - Text by M. Alan Kazlev A development of Fedspek (Middle Anglish) in the ComEmp period, still used today. A formal, scholarly, aristocratic, ceremonial, and diplomatic language, supported by the Mutual Progress Alliance. The Solar Dominion naturally point out the virtues and superiority of High Solarian as a ceremonial language, but High Solarian is a more difficult tongue to master, and not spoken outside Dominion and Dominion-client worlds.
Middle Anglish (Federation Anglish, Fedspek) - Text by M. Alan Kazlev A popular upper class and diplomatic language that then acquired wider use among the other classes as well, in wide use during the Second Federation, and experienced a revival during the nostalgic period of the ComEmp. Rather similar to Edenese (both languages share a number of words and phrases). Since the Second Federation Ontology was Fedspek friendly the Solar Dominion wanted nothing to do with it. The Mutual Progress Alliance and the NoCoZo however supported it. Today pure Fedspek is only found in a few worlds and habitats of the Outer Volumes and the Periphery. However, derivative language like High Anglish, Low Anglish, New Anglish, and Newfed, and their further derivatives, are common.
Proto-Anglish (also New English, Space English) - Text by M. Alan Kazlev An Interplanetary Age language resulting from fusion of Late Industrial and Early Information Age Modern English with elements of other languages like Russian, Spanish, Chinese, Japanese, Hindi, ircspeak, ebonics, and so on - simpler grammar and syntax than Modern English, but with a lot of technical terms and very rich in neologisms. No longer in use anywhere.