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diff --git a/users/grfn/xanthous/src/Xanthous/Generators/Speech.hs b/users/grfn/xanthous/src/Xanthous/Generators/Speech.hs
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+{-# LANGUAGE TemplateHaskell #-}
+--------------------------------------------------------------------------------
+module Xanthous.Generators.Speech
+  ( -- * Abstract phonotactics
+    Phonotactics(..)
+    -- ** Lenses
+  , onsets
+  , nuclei
+  , codas
+  , numOnsets
+  , numNuclei
+  , numCodas
+
+    -- ** Definitions for languages
+  , english
+
+    -- * Language generation
+  , syllable
+
+  ) where
+--------------------------------------------------------------------------------
+import           Xanthous.Prelude hiding (replicateM)
+import           Data.Interval (Interval)
+import qualified Data.Interval as Interval
+import           Control.Monad.Random.Class (MonadRandom)
+import           Xanthous.Random (chooseRange, choose, ChooseElement (ChooseElement))
+import           Control.Monad (replicateM)
+--------------------------------------------------------------------------------
+
+newtype Phoneme = Phoneme Text
+  deriving stock (Show, Eq, Generic)
+  deriving anyclass (NFData)
+  deriving newtype (IsString, Semigroup, Monoid)
+
+data Phonotactics = Phonotactics
+  { _onsets    :: [Phoneme]
+  , _nuclei    :: [Phoneme]
+  , _codas     :: [Phoneme]
+  , _numOnsets :: Interval Word
+  , _numNuclei :: Interval Word
+  , _numCodas  :: Interval Word
+  }
+  deriving stock (Show, Eq, Generic)
+  deriving anyclass (NFData)
+makeLenses ''Phonotactics
+
+syllable :: MonadRandom m => Phonotactics -> m Text
+syllable phonotactics = do
+  let genPart num choices = do
+        n <- fromIntegral . fromMaybe 0 <$> chooseRange (phonotactics ^. num)
+        fmap (fromMaybe mempty . mconcat)
+          . replicateM n
+          . choose . ChooseElement
+          $ phonotactics ^. choices
+
+  (Phoneme onset) <- genPart numOnsets onsets
+  (Phoneme nucleus) <- genPart numNuclei nuclei
+  (Phoneme coda) <- genPart numCodas codas
+
+  pure $ onset <> nucleus <> coda
+
+--------------------------------------------------------------------------------
+
+-- <https://en.wikipedia.org/wiki/English_phonology#Phonotactics>
+english :: Phonotactics
+english = Phonotactics
+  { _onsets = [ "pl" , "bl" , "kl" , "gl" , "pr" , "br" , "tr" , "dr" , "kr"
+              , "gr" , "tw" , "dw" , "gw" , "kw" , "pw"
+
+              , "fl" , "sl" , {- "thl", -} "shl" {- , "vl" -}
+              , "p", "b", "t", "d", "k", "ɡ", "m", "n", "f", "v", "th", "s"
+              , "z", "h", "l", "w"
+
+              , "sp", "st", "sk"
+
+              , "sm", "sn"
+
+              , "sf", "sθ"
+
+              , "spl", "skl", "spr", "str", "skr", "skw", "sm", "sp", "st", "sk"
+              ]
+  , _nuclei = [ "a", "e", "i", "o", "u", "ur", "ar", "or", "ear", "are", "ure"
+              , "oa", "ee", "oo", "ei", "ie", "oi", "ou"
+              ]
+  , _codas = [ "m", "n", "ng", "p", "t", "tsh", "k", "f", "sh", "s", "th", "x"
+             , "v", "z", "zh", "l", "r", "w"
+
+             , "lk", "lb", "lt", "ld", "ltsh", "ldsh", "lk"
+             , "rp", "rb", "rt", "rd", "rtsh", "rdsh", "rk", "rɡ"
+             , "lf", "lv", "lth", "ls", "lz", "lsh", "lth"
+             , "rf", "rv", "rth", "rs", "rz", "rth"
+             , "lm", "ln"
+             , "rm", "rn", "rl"
+             , "mp", "nt", "nd", "nth", "nsh", "ŋk"
+             , "mf", "ms", "mth", "nf", "nth", "ns", "nz", "ŋθ"
+             , "ft", "sp", "st", "sk"
+             , "fth"
+             , "pt", "kt"
+             , "pth", "ps", "th", "ts", "dth", "dz", "ks"
+             , "lpt", "lps", "lfth", "lts", "lst", "lkt", "lks"
+             , "rmth", "rpt", "rps", "rts", "rst", "rkt"
+             , "mpt", "mps", "ndth", "ŋkt", "ŋks", "ŋkth"
+             , "ksth", "kst"
+             ]
+  , _numOnsets = Interval.singleton 1
+  , _numNuclei = Interval.singleton 1
+  , _numCodas  = Interval.singleton 1
+  }