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Reanalysis of the Basay Syllable Inventory

Correcting a Mixed-Source Analysis and Evidence for Language Contact

Tsai, Y.-k. (2026). Reanalysis of the Basay syllable inventory: Correcting a mixed-source analysis and evidence for language contact. basay.tw. https://basay.tw/research/2026-06-basay-syllable-revised/en/

@misc{tsai2026syllableRevised_en,
  author = {Tsai, Yung-kuei},
  title  = {Reanalysis of the {Basay} Syllable Inventory},
  year   = {2026},
  month  = {6},
  url    = {https://basay.tw/research/2026-06-basay-syllable-revised/en/},
  note   = {Correcting a mixed-source analysis and evidence for Kavalan language contact}
}

1. Introduction: The Mixed Analysis and Its Problems

A preceding study pooled all non-PAN entries (2,364) from the Basay lexical database and reported 486 syllable types (frequency ≥ 2). That analysis attributed phonemes including /q/, /z/, /ɭ/, and /ɮ/ to Basay and described the inventory as CV-dominant.

The database contains entries assigned to six source codes (Table 1). Pooling B (native vocabulary), T and M (Yilan area dialects), and S (a source with suspected heavy Kavalan admixture, excluded here) without separation treats distinct phonological layers as a single system. This is a methodological error that this paper corrects.

2. Corrected Results

2.1 Scale

2.2 Syllable Structure

2.3 Onset Distribution

3. The Kavalan Contact Hypothesis

Six onset types exclusive to T+M — /q/, /z/, /ɮ/, /ɭ/, /mɭ/, /vɭ/ — are documented phonemes of Kavalan (Li 2000), the Formosan language indigenous to the Yilan Plain adjacent to the Basay Yilan dialect territory. Their combined frequency in T+M reaches approximately 176 tokens across 34 syllable types, and they are entirely absent from source=B.

Under Thomason & Kaufman's (1988) contact typology, systemic integration of borrowed phonemes at this scale indicates intensive contact, not incidental lexical borrowing. The parallel increase of CVVC structures in T+M (26 types vs. 7 in B) — particularly involving the Kavalan-derived z and z' onsets — extends the contact evidence to the level of syllable structure.

The absence of h, /ʃ/, and /tʃ/ from T+M, all present in source=B, may reflect convergence toward the Kavalan phonological type, which lacks these segments. This constitutes possible contact-induced attrition in the T+M variety.

4. Methodological Lessons

The mixed analysis produced four compounding errors, each traceable to source pooling:

1. Inflated inventory size: 486 types vs. B=266, T+M=315 (overlap 128)
2. Distorted structure profile: CV apparent dominance masks CVC dominance in native vocabulary (134 types, 50%)
3. Misattributed phonemes: /q/, /z/, /ɭ/, /ɮ/ described as native Basay phonemes
4. Obscured contact signal: T+M's Kavalan-derived phonemes merged with native vocabulary, preventing detection of the contact pattern

For documentary databases covering multiple dialect strata, source separation before phonological analysis is not optional. The source labels in such databases encode linguistically meaningful distinctions; ignoring them is equivalent to pooling data from different languages.

5. Revised Claims

6. Conclusion

Source-separated reanalysis corrects the mixed-analysis account of Basay phonology in three respects: inventory size, syllable structure dominance, and phoneme attribution. The T+M-exclusive phonemes are reinterpreted as Kavalan contact borrowings, a hypothesis supported by geographic adjacency, phoneme identity, high token frequency, and structural parallelism. The corrected files (source=B and T+M syllable inventories) are publicly available at basay.tw; the prior mixed analysis is preserved in the archive with a correction notice linking to this paper.

References

• Blust, R. (1999). Subgrouping, circularity and extinction. In E. Zeitoun & P. J.-K. Li (Eds.), Selected papers from the Eighth International Conference on Austronesian Linguistics (pp. 31–94). Academia Sinica.
• Blevins, J. (1995). The syllable in phonological theory. In J. A. Goldsmith (Ed.), The handbook of phonological theory (pp. 206–244). Blackwell.
• Li, Paul Jen-kuei. (1996). The Formosan Tribes and Languages in I-Lan. Yilan: Yilan County Government.
• Li, Paul Jen-kuei. (2000). The Phonological System of Taiwan Austronesian Languages. Taipei: Crane Publishing.
• Thomason, S. G., & Kaufman, T. (1988). Language contact, creolization, and genetic linguistics. University of California Press.
• Institute of Linguistics, Academia Sinica (Ed.). Basay Lexical Database (basay_dict.jsonl). Taipei: Academia Sinica.

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