fix: metasound truncation order, add 4 missing consonants per paper - #1384
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…licate Three fixes in soundex module: - Filter karan spaces before truncating to requested length - Add ฏ,ฑ,ถ,ธ to _C2 (dental class, same sound as ท,ด) - Remove duplicate ข in prayut_and_somchaip _C2
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Pull request overview
Fixes MetaSound’s implementation to match the referenced paper and resolves a truncation-order bug that produced incorrect codes when karan (์) removal introduced spaces.
Changes:
- Filter out karan-introduced spaces before truncating MetaSound output to the requested length.
- Add ฏ, ฑ, ถ, ธ to MetaSound
_C2consonant group (per Snae & Brückner, 2009). - Remove a duplicate ข in
prayut_and_somchaip._C2and add regression tests for the MetaSound fixes.
Reviewed changes
Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| tests/core/test_soundex.py | Adds regression tests covering karan-truncation order and the 4 missing _C2 consonants. |
| pythainlp/soundex/prayut_and_somchaip.py | Removes duplicated ข from _C2 (no functional behavior change expected). |
| pythainlp/soundex/metasound.py | Fixes truncation order and expands _C2 to include ฏ, ฑ, ถ, ธ. |
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This PR is stale because it has been open for 30 days with no activity. |
wannaphong
approved these changes
Jun 25, 2026
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What do these changes do
Fix metasound:
_C2per the original paper (Snae & Brückner, 2009, Table p.507)Fixes #1383