Central Kalapuyan was aKalapuyan language indigenous to the central and southernWillamette Valley inOregon in theUnited States. It was spoken by various bands of theKalapuya peoples who inhabited the valley up through the middle of the 19th century. The language is closely related toNorthern Kalapuya, spoken in theTualatin andYamhill valleys.

Dialects of Central Kalapuya that have been identified include:

• Ahantchuyuk dialect, spoken in the northeastern Willamette Valley along thePudding andMolalla rivers
• Santiam dialect, spoken in the central Willamette Valley along the lowerSantiam River
• Luckiamute dialect, spoken in the central Willamette Valley along theLuckiamute River
• Chepenafa dialect, spoken in the central Willamette Valley alongMarys River
• Chemapho dialect, spoken in the central Willamette Valley alongMuddy Creek
• Chelamela dialect, spoken in the southwestern Willamette Valley along theLong Tom River
• Tsankupi dialect, spoken in the southeastern Willamette Valley along theCalapooia River
• Winefelly-Mohawk dialects, spoken in the southeastern Willamette Valley along theMcKenzie,Mohawk, andCoast Fork Willamette rivers

The phonology of the Santiam dialect, as described by Jacobs (1945) and analyzed by Banks (2007), is listed below.^[3][4] Banks notes that Jacobs' analysis does not rigorously account for allophonic variation, and that, according to Jacobs, there may have been some interchangeability between the velar and uvular series.^[4]

The nasals[m] and[n] likely had syllabic forms:[m̩] and[n̩]. Jacobs possibly notes that the plosives also have voiced allophones, as[b],[d],[ɡ],[ɡʷ],[ɢ], and[ɢʷ]. Banks also notes that /h/, /hʷ/, /dz/, /dʒ/, and /ɸʷ/ may have been allophones.^[4]

Santiam Kalapuya had three diphthongs: [ai], [au], and [ui]. Vowel length may have been phonemic, /ɔ/ may have been an allophone of /u/.^[4]

• The Verbal Morphology of Santiam Kalapuya (Northwest Journal of Linguistics)

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