Igbo Language Vitality & Tonal Grammar Explorer

Sociolinguistic Context: In response to conversations surrounding local language heritage versus global trade utility (such as French or English), this workbench models the structural mechanics of Igbo (Asụsụ Igbo)—from pitch tone contours and vowel harmony to 20-year Fishman GIDS intergenerational vitality projections.

2D Pitch Trajectory Canvas

Select Canonical Igbo Phrase:

High Tone (H)

Low Tone (L)

Downstep (!H)

Syllable Phonetics & Pitch Controls

Igbo is a strict tonal language where pitch changes word meaning (e.g., ákwá = crying, àkwà = bed, àkwá = egg, ákdistributed). Scrub pitch nodes or adjust frequencies below:

Syllable	Tone Class	Frequency (Hz)	IPA Symbol

Downstep (!H) Note: Downstep occurs when a High tone immediately following a Low or previous High is realized at a lower baseline frequency without becoming a true Low tone.

Agglutinative Verb Extension Builder

Igbo verbs consist of a monosyllabic root agglutinated with aspectual suffixes, directional markers, and negative markers.

1. Choose Verb Root:

2. Toggle Suffix Extensions:

✓ Vowel Harmony (Ọnụ-ụdọ) Status: Valid (+ATR Group Match)

Synthesized Construction Analysis

Constructed Igbo Verb

mego

"Has finished doing"

Vowel Harmony Rules (Ọnụ-ụdọ):

Igbo vowels strictly segregate into two harmonizing sets based on Advanced Tongue Root (+ATR vs -ATR):

Set A (+ATR): i, e, u, o
Set B (-ATR): ị, a, ụ, ọ

Functional Domain Transmission Indices

Adjust generational transmission rates across social domains to evaluate language shift vs vitality:

1. Home & Intergenerational Family 70%

2. Local Commerce & Trade Markets 40%

3. Digital Media & Pop Culture 55%

4. Formal Education & Institutional Governance 25%

Fishman's GIDS Assessment & 20-Yr Projection

Calculated Status

Stage 6a: Vigorous / Safe

The language is used orally across all generations and transmitted to children within home and community settings.

20-Year Vitality Trajectory Simulation (2026–2046):

Igbo Proverb (Ịlụ) Structural & Cultural Matrix

Proverbs are described in Igbo tradition as "mmanụ eji eji kwuo okwu" (the palm oil with which words are eaten). Explore the structural translation layers below:

Sociolinguistic Diagnostic Brief

Summary of model parameters, phonetic pitch profiles, agglutinative configurations, and domain vitality projections generated during this session:

✓ Assessment schema ready for research export.