From Creatures Wikia
The Handish is meant to be the species to which the Hand and others like it belong. Mostly used on alt.games.creatures, often used to refer to developers in story-style third-person. It can also be used to refer to the language taught to creatures by the Hand (whether that is in fact English, German, French or another language).
According to Maxite, they were created when Steve Grand had his hand bitten off by a Grendel while playing.
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