Ewe - Wikilangs Models
Comprehensive Research Report & Full Ablation Study
This repository contains NLP models trained and evaluated by Wikilangs, specifically on Ewe Wikipedia data. We analyze tokenizers, n-gram models, Markov chains, vocabulary statistics, and word embeddings.
π Repository Contents
Models & Assets
- Tokenizers (8k, 16k, 32k, 64k)
- N-gram models (2, 3, 4, 5-gram)
- Markov chains (context of 1, 2, 3, 4 and 5)
- Subword N-gram and Markov chains
- Embeddings in various sizes and dimensions (aligned and unaligned)
- Language Vocabulary
- Language Statistics
Analysis and Evaluation
- 1. Tokenizer Evaluation
- 2. N-gram Model Evaluation
- 3. Markov Chain Evaluation
- 4. Vocabulary Analysis
- 5. Word Embeddings Evaluation
- 6. Morphological Analysis (Experimental)
- 7. Summary & Recommendations
- Metrics Glossary
- Visualizations Index
1. Tokenizer Evaluation
Results
| Vocab Size | Compression | Avg Token Len | UNK Rate | Total Tokens |
|---|---|---|---|---|
| 8k | 3.822x | 3.83 | 0.5658% | 181,329 |
| 16k | 4.082x | 4.09 | 0.6044% | 169,762 |
| 32k | 4.309x π | 4.31 | 0.6380% | 160,824 |
Tokenization Examples
Below are sample sentences tokenized with each vocabulary size:
Sample 1: Ata Messan Ajavon Zeus nye Togo dunyahela, eye wΓ²nye Save Togo Collective Ζe zim...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βata βme ssan βaja von βze us βnye βtogo βdunyahela ... (+18 more) |
28 |
| 16k | βata βmessan βajavon βze us βnye βtogo βdunyahela , βeye ... (+15 more) |
25 |
| 32k | βata βmessan βajavon βzeus βnye βtogo βdunyahela , βeye βwΓ²nye ... (+13 more) |
23 |
Sample 2: South Carolina nye dukΙ aΙe le United States. States
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βsouth βcaro lina βnye βdukΙ βaΙe βle βunited βstates . ... (+1 more) |
11 |
| 16k | βsouth βcarolina βnye βdukΙ βaΙe βle βunited βstates . βstates |
10 |
| 32k | βsouth βcarolina βnye βdukΙ βaΙe βle βunited βstates . βstates |
10 |
Sample 3: GbΙeviAziaku, Vincent Erskine. A Linguistic Analysis of Ewe Animal Names among t...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βgbΙe viaziaku , βvincent βerskine . βa βlinguistic βanalysis βof ... (+19 more) |
29 |
| 16k | βgbΙe viaziaku , βvincent βerskine . βa βlinguistic βanalysis βof ... (+19 more) |
29 |
| 32k | βgbΙeviaziaku , βvincent βerskine . βa βlinguistic βanalysis βof βewe ... (+18 more) |
28 |
Key Findings
- Best Compression: 32k achieves 4.309x compression
- Lowest UNK Rate: 8k with 0.5658% unknown tokens
- Trade-off: Larger vocabularies improve compression but increase model size
- Recommendation: 32k vocabulary provides optimal balance for production use
2. N-gram Model Evaluation
Results
| N-gram | Variant | Perplexity | Entropy | Unique N-grams | Top-100 Coverage | Top-1000 Coverage |
|---|---|---|---|---|---|---|
| 2-gram | Word | 3,050 | 11.57 | 7,157 | 23.6% | 56.9% |
| 2-gram | Subword | 259 π | 8.02 | 1,996 | 66.4% | 99.2% |
| 3-gram | Word | 4,032 | 11.98 | 8,747 | 22.9% | 48.1% |
| 3-gram | Subword | 1,781 | 10.80 | 12,826 | 32.5% | 74.7% |
| 4-gram | Word | 6,737 | 12.72 | 13,766 | 19.8% | 37.5% |
| 4-gram | Subword | 7,506 | 12.87 | 51,628 | 17.9% | 48.5% |
| 5-gram | Word | 4,126 | 12.01 | 8,899 | 24.0% | 42.0% |
| 5-gram | Subword | 18,211 | 14.15 | 94,077 | 11.1% | 34.7% |
Top 5 N-grams by Size
2-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | le Ζe |
2,279 |
| 2 | Ζe me |
1,784 |
| 3 | me la |
1,442 |
| 4 | me le |
1,115 |
| 5 | si nye |
1,012 |
3-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | le Ζe me |
1,460 |
| 2 | Ζe me la |
652 |
| 3 | va Ιo Ζe |
327 |
| 4 | Ζe va Ιo |
319 |
| 5 | tso Ζe va |
311 |
4-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | le Ζe me la |
540 |
| 2 | Ζe va Ιo Ζe |
316 |
| 3 | tso Ζe va Ιo |
302 |
| 4 | vincent erskine a linguistic |
256 |
| 5 | erskine a linguistic analysis |
256 |
5-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | tso Ζe va Ιo Ζe |
300 |
| 2 | linguistic analysis of ewe animal |
256 |
| 3 | analysis of ewe animal names |
256 |
| 4 | of ewe animal names among |
256 |
| 5 | ewe animal names among the |
256 |
2-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | e _ |
93,022 |
| 2 | a _ |
32,972 |
| 3 | o _ |
26,746 |
| 4 | w o |
25,054 |
| 5 | _ a |
23,819 |
3-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | Ζ e _ |
21,210 |
| 2 | l e _ |
20,474 |
| 3 | _ Ζ e |
16,656 |
| 4 | w o _ |
15,423 |
| 5 | _ l e |
14,771 |
4-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | _ Ζ e _ |
16,518 |
| 2 | _ l e _ |
14,241 |
| 3 | n y e _ |
6,181 |
| 4 | _ s i _ |
6,094 |
| 5 | _ m e _ |
5,720 |
5-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | k p l e _ |
4,986 |
| 2 | _ k p l e |
4,841 |
| 3 | o _ Ζ e _ |
4,832 |
| 4 | e _ Ζ e _ |
4,358 |
| 5 | _ n y e _ |
3,640 |
Key Findings
- Best Perplexity: 2-gram (subword) with 259
- Entropy Trend: Decreases with larger n-grams (more predictable)
- Coverage: Top-1000 patterns cover ~35% of corpus
- Recommendation: 4-gram or 5-gram for best predictive performance
3. Markov Chain Evaluation
Results
| Context | Variant | Avg Entropy | Perplexity | Branching Factor | Unique Contexts | Predictability |
|---|---|---|---|---|---|---|
| 1 | Word | 0.7631 | 1.697 | 4.67 | 25,800 | 23.7% |
| 1 | Subword | 1.5369 | 2.902 | 11.32 | 389 | 0.0% |
| 2 | Word | 0.2897 | 1.222 | 1.68 | 120,194 | 71.0% |
| 2 | Subword | 1.0150 | 2.021 | 5.66 | 4,399 | 0.0% |
| 3 | Word | 0.1029 | 1.074 | 1.17 | 201,432 | 89.7% |
| 3 | Subword | 0.7954 | 1.736 | 3.60 | 24,892 | 20.5% |
| 4 | Word | 0.0390 π | 1.027 | 1.06 | 235,375 | 96.1% |
| 4 | Subword | 0.5399 | 1.454 | 2.27 | 89,556 | 46.0% |
Generated Text Samples (Word-based)
Below are text samples generated from each word-based Markov chain model:
Context Size 1:
Ζe sewΙtakpekpea me le berlin takpekpea me manya alesi wΓ²hiΓ£ be yeΖe dukΙa Ζe dunyahehewo Ζele ho Κlim le dukplΙla Ζe ΙoΙo aΙe Ζe bisiΙp gbΓ£tΙ kple dzoΙagbe kple nubablawo gΙmeeme nuzazΓ£wo kple la Εkoe nye eΖe sukudede dzΙdzΙmeΕutinunya Ζe nuwΙna me be wΓ²anye nutala afia
Context Size 2:
le Ζe me eye wΓ²tso bole le savanna nutome wodzi mahama le november 28 dzi le guadeloupeΖe me emegbe exΙ ΙΙkta Ζe dzeside adre kple afΓ£ tso dukΙ yome me le south africame la gold coast le tedoxe 26 dzi kple agbalαΊ½tamΙΜ gΓ£wo siaa me wotsΙ nya Ιe ame
Context Size 3:
le Ζe me eye archdeacon le Ζe enye sinima gbΓ£tΙ si woΙe le Ζe me eye wΓ²ka atamΖe me la eΙe eme be mefia be wΓ² agbe mele vevie o 11 koe gblΙ be ameyibΙwova Ιo Ζe dome defontaine ku le hΓ©nin sur cojeul Ζe dumegΓ£ le Ζe va Ιo Ζe le
Context Size 4:
le Ζe me la enye europa dukΙwo Ζe habΙbΙ me eΖe zimenΙla si woti le Ζe me lae nyeΖe va Ιo Ζe tso Ζe va Ιo Ζe dΙmedzoedonamea xΙ Ζe eve agbalαΊ½a me tΙ vevitΙe nye dΙwΙhawotso Ζe va Ιo Ζe enΙ pyrΓ©nΓ©es atlantiques dΙwΙΖea teΖe grenet nye radical party me tΙ enye orlΓ©ans Ζe
Generated Text Samples (Subword-based)
Below are text samples generated from each subword-based Markov chain model:
Context Size 1:
_aΖe_aΙena_(_na_e_dzu_alaxa_etsiameΙonye_si_d_ye
Context Size 2:
e_la_nyations_me_a_culymmakple_du_o_frafia_Ζe_a._me
Context Size 3:
Ζe_3,_dzΙ_dome_ΕgΙle_ta_12._don_le_a_Ζe_nu_dze_la,_wod
Context Size 4:
_Ζe_me_da_asitsi_et_le_du_be_la,_eye_wnye_to_february_raw
Key Findings
- Best Predictability: Context-4 (word) with 96.1% predictability
- Branching Factor: Decreases with context size (more deterministic)
- Memory Trade-off: Larger contexts require more storage (89,556 contexts)
- Recommendation: Context-3 or Context-4 for text generation
4. Vocabulary Analysis
Statistics
| Metric | Value |
|---|---|
| Vocabulary Size | 11,578 |
| Total Tokens | 260,556 |
| Mean Frequency | 22.50 |
| Median Frequency | 3 |
| Frequency Std Dev | 257.37 |
Most Common Words
| Rank | Word | Frequency |
|---|---|---|
| 1 | Ζe | 16,951 |
| 2 | le | 14,512 |
| 3 | me | 8,468 |
| 4 | si | 6,279 |
| 5 | la | 4,866 |
| 6 | kple | 4,852 |
| 7 | be | 3,745 |
| 8 | nye | 3,709 |
| 9 | Ιe | 3,263 |
| 10 | siwo | 2,545 |
Least Common Words (from vocabulary)
| Rank | Word | Frequency |
|---|---|---|
| 1 | woΙunΙ | 2 |
| 2 | couscous | 2 |
| 3 | fufΓΊ | 2 |
| 4 | loi | 2 |
| 5 | klottey | 2 |
| 6 | korle | 2 |
| 7 | domelovo | 2 |
| 8 | agorbaya | 2 |
| 9 | uttar | 2 |
| 10 | pradesh | 2 |
Zipf's Law Analysis
| Metric | Value |
|---|---|
| Zipf Coefficient | 1.1638 |
| RΒ² (Goodness of Fit) | 0.992157 |
| Adherence Quality | excellent |
Coverage Analysis
| Top N Words | Coverage |
|---|---|
| Top 100 | 49.7% |
| Top 1,000 | 78.5% |
| Top 5,000 | 93.7% |
| Top 10,000 | 98.8% |
Key Findings
- Zipf Compliance: RΒ²=0.9922 indicates excellent adherence to Zipf's law
- High Frequency Dominance: Top 100 words cover 49.7% of corpus
- Long Tail: 1,578 words needed for remaining 1.2% coverage
5. Word Embeddings Evaluation
5.1 Cross-Lingual Alignment
5.2 Model Comparison
| Model | Dimension | Isotropy | Semantic Density | Alignment R@1 | Alignment R@10 |
|---|---|---|---|---|---|
| mono_32d | 32 | 0.7155 π | 0.3892 | N/A | N/A |
| mono_64d | 64 | 0.2811 | 0.3672 | N/A | N/A |
| mono_128d | 128 | 0.0660 | 0.3770 | N/A | N/A |
| aligned_32d | 32 | 0.7155 | 0.4123 | 0.0180 | 0.1660 |
| aligned_64d | 64 | 0.2811 | 0.3853 | 0.0500 | 0.2600 |
| aligned_128d | 128 | 0.0660 | 0.3736 | 0.0840 | 0.2920 |
Key Findings
- Best Isotropy: mono_32d with 0.7155 (more uniform distribution)
- Semantic Density: Average pairwise similarity of 0.3841. Lower values indicate better semantic separation.
- Alignment Quality: Aligned models achieve up to 8.4% R@1 in cross-lingual retrieval.
- Recommendation: 128d aligned for best cross-lingual performance
6. Morphological Analysis (Experimental)
This section presents an automated morphological analysis derived from the statistical divergence between word-level and subword-level models. By analyzing where subword predictability spikes and where word-level coverage fails, we can infer linguistic structures without supervised data.
6.1 Productivity & Complexity
| Metric | Value | Interpretation | Recommendation |
|---|---|---|---|
| Productivity Index | 5.000 | High morphological productivity | Reliable analysis |
| Idiomaticity Gap | 0.210 | High formulaic/idiomatic content | - |
6.2 Affix Inventory (Productive Units)
These are the most productive prefixes and suffixes identified by sampling the vocabulary for global substitutability patterns. A unit is considered an affix if stripping it leaves a valid stem that appears in other contexts.
Productive Prefixes
| Prefix | Examples |
|---|
Productive Suffixes
| Suffix | Examples |
|---|---|
-e |
okeke, dzoe, exΙe |
-wo |
yeyeawo, kadodowo, eΙewo |
-awo |
yeyeawo, franseawo, kΙwlΙawo |
6.3 Bound Stems (Lexical Roots)
Bound stems are high-frequency subword units that are semantically cohesive but rarely appear as standalone words. These often correspond to the 'core' of a word that requires inflection or derivation to be valid.
| Stem | Cohesion | Substitutability | Examples |
|---|---|---|---|
gbal |
1.65x | 17 contexts | gbalΙ, gbale, gbalΓ© |
lawo |
1.59x | 14 contexts | xΙlawo, dolawo, nΙlawo |
pekp |
1.82x | 9 contexts | kpekpe, kpekpea, kpekpeme |
dΙwΙ |
1.66x | 11 contexts | dΙwΙm, dΙwΙla, dΙwΙΖe |
balαΊ½ |
1.72x | 9 contexts | agbalαΊ½, gbalαΊ½a, lΓ£gbalαΊ½ |
omet |
1.44x | 14 contexts | wometa, tometi, ΖometΙ |
dziΙ |
1.82x | 7 contexts | dziΙum, dziΙuΙu, dziΙula |
ziΙu |
1.89x | 6 contexts | dziΙum, dziΙuΙu, dziΙula |
takp |
1.74x | 7 contexts | takpΙha, takpΙΖe, takpΙΖea |
nyat |
1.68x | 7 contexts | nyati, nyatia, nyatiwo |
iΙuΙ |
1.91x | 5 contexts | dziΙuΙu, dziΙuΙua, dziΙuΙuha |
iawo |
1.64x | 7 contexts | siawo, fiawo, viawo |
6.4 Affix Compatibility (Co-occurrence)
This table shows which prefixes and suffixes most frequently co-occur on the same stems, revealing the 'stacking' rules of the language's morphology.
No significant affix co-occurrences detected.
6.5 Recursive Morpheme Segmentation
Using Recursive Hierarchical Substitutability, we decompose complex words into their constituent morphemes. This approach handles nested affixes (e.g., prefix-prefix-root-suffix).
| Word | Suggested Split | Confidence | Stem |
|---|---|---|---|
| gbegbΙgblΙwo | gbegbΙgblΙ-wo |
4.5 | gbegbΙgblΙ |
| aΖemelΓ£wo | aΖemelΓ£-wo |
4.5 | aΖemelΓ£ |
| gbebiamewo | gbebiame-wo |
4.5 | gbebiame |
| srΙΜtΙawo | srΙΜtΙ-awo |
4.5 | srΙΜtΙ |
| lebanontΙwo | lebanontΙ-wo |
4.5 | lebanontΙ |
| wuietΙΜawo | wuietΙΜ-awo |
4.5 | wuietΙΜ |
| domenyiΕkΙwo | domenyiΕkΙ-wo |
4.5 | domenyiΕkΙ |
| ΕkuΙodzikpewo | ΕkuΙodzikpe-wo |
4.5 | ΕkuΙodzikpe |
| nukpΙsusuwo | nukpΙsusu-wo |
4.5 | nukpΙsusu |
| swedentΙwo | swedentΙ-wo |
4.5 | swedentΙ |
| asanteawo | asante-awo |
4.5 | asante |
| sΙlemexΙwo | sΙlemexΙ-wo |
4.5 | sΙlemexΙ |
| akpΙkplΙwo | akpΙkplΙ-wo |
4.5 | akpΙkplΙ |
| amegΓ£xiwo | amegΓ£xi-wo |
4.5 | amegΓ£xi |
| ukrainetΙwo | ukrainetΙ-wo |
4.5 | ukrainetΙ |
6.6 Linguistic Interpretation
Automated Insight: The language Ewe shows high morphological productivity. The subword models are significantly more efficient than word models, suggesting a rich system of affixation or compounding.
7. Summary & Recommendations
Production Recommendations
| Component | Recommended | Rationale |
|---|---|---|
| Tokenizer | 32k BPE | Best compression (4.31x) |
| N-gram | 2-gram | Lowest perplexity (259) |
| Markov | Context-4 | Highest predictability (96.1%) |
| Embeddings | 100d | Balanced semantic capture and isotropy |
Appendix: Metrics Glossary & Interpretation Guide
This section provides definitions, intuitions, and guidance for interpreting the metrics used throughout this report.
Tokenizer Metrics
Compression Ratio
Definition: The ratio of characters to tokens (chars/token). Measures how efficiently the tokenizer represents text.
Intuition: Higher compression means fewer tokens needed to represent the same text, reducing sequence lengths for downstream models. A 3x compression means ~3 characters per token on average.
What to seek: Higher is generally better for efficiency, but extremely high compression may indicate overly aggressive merging that loses morphological information.
Average Token Length (Fertility)
Definition: Mean number of characters per token produced by the tokenizer.
Intuition: Reflects the granularity of tokenization. Longer tokens capture more context but may struggle with rare words; shorter tokens are more flexible but increase sequence length.
What to seek: Balance between 2-5 characters for most languages. Arabic/morphologically-rich languages may benefit from slightly longer tokens.
Unknown Token Rate (OOV Rate)
Definition: Percentage of tokens that map to the unknown/UNK token, indicating words the tokenizer cannot represent.
Intuition: Lower OOV means better vocabulary coverage. High OOV indicates the tokenizer encounters many unseen character sequences.
What to seek: Below 1% is excellent; below 5% is acceptable. BPE tokenizers typically achieve very low OOV due to subword fallback.
N-gram Model Metrics
Perplexity
Definition: Measures how "surprised" the model is by test data. Mathematically: 2^(cross-entropy). Lower values indicate better prediction.
Intuition: If perplexity is 100, the model is as uncertain as if choosing uniformly among 100 options at each step. A perplexity of 10 means effectively choosing among 10 equally likely options.
What to seek: Lower is better. Perplexity decreases with larger n-grams (more context). Values vary widely by language and corpus size.
Entropy
Definition: Average information content (in bits) needed to encode the next token given the context. Related to perplexity: perplexity = 2^entropy.
Intuition: High entropy means high uncertainty/randomness; low entropy means predictable patterns. Natural language typically has entropy between 1-4 bits per character.
What to seek: Lower entropy indicates more predictable text patterns. Entropy should decrease as n-gram size increases.
Coverage (Top-K)
Definition: Percentage of corpus occurrences explained by the top K most frequent n-grams.
Intuition: High coverage with few patterns indicates repetitive/formulaic text; low coverage suggests diverse vocabulary usage.
What to seek: Depends on use case. For language modeling, moderate coverage (40-60% with top-1000) is typical for natural text.
Markov Chain Metrics
Average Entropy
Definition: Mean entropy across all contexts, measuring average uncertainty in next-word prediction.
Intuition: Lower entropy means the model is more confident about what comes next. Context-1 has high entropy (many possible next words); Context-4 has low entropy (few likely continuations).
What to seek: Decreasing entropy with larger context sizes. Very low entropy (<0.1) indicates highly deterministic transitions.
Branching Factor
Definition: Average number of unique next tokens observed for each context.
Intuition: High branching = many possible continuations (flexible but uncertain); low branching = few options (predictable but potentially repetitive).
What to seek: Branching factor should decrease with context size. Values near 1.0 indicate nearly deterministic chains.
Predictability
Definition: Derived metric: (1 - normalized_entropy) Γ 100%. Indicates how deterministic the model's predictions are.
Intuition: 100% predictability means the next word is always certain; 0% means completely random. Real text falls between these extremes.
What to seek: Higher predictability for text generation quality, but too high (>98%) may produce repetitive output.
Vocabulary & Zipf's Law Metrics
Zipf's Coefficient
Definition: The slope of the log-log plot of word frequency vs. rank. Zipf's law predicts this should be approximately -1.
Intuition: A coefficient near -1 indicates the corpus follows natural language patterns where a few words are very common and most words are rare.
What to seek: Values between -0.8 and -1.2 indicate healthy natural language distribution. Deviations may suggest domain-specific or artificial text.
RΒ² (Coefficient of Determination)
Definition: Measures how well the linear fit explains the frequency-rank relationship. Ranges from 0 to 1.
Intuition: RΒ² near 1.0 means the data closely follows Zipf's law; lower values indicate deviation from expected word frequency patterns.
What to seek: RΒ² > 0.95 is excellent; > 0.99 indicates near-perfect Zipf adherence typical of large natural corpora.
Vocabulary Coverage
Definition: Cumulative percentage of corpus tokens accounted for by the top N words.
Intuition: Shows how concentrated word usage is. If top-100 words cover 50% of text, the corpus relies heavily on common words.
What to seek: Top-100 covering 30-50% is typical. Higher coverage indicates more repetitive text; lower suggests richer vocabulary.
Word Embedding Metrics
Isotropy
Definition: Measures how uniformly distributed vectors are in the embedding space. Computed as the ratio of minimum to maximum singular values.
Intuition: High isotropy (near 1.0) means vectors spread evenly in all directions; low isotropy means vectors cluster in certain directions, reducing expressiveness.
What to seek: Higher isotropy generally indicates better-quality embeddings. Values > 0.1 are reasonable; > 0.3 is good. Lower-dimensional embeddings tend to have higher isotropy.
Average Norm
Definition: Mean magnitude (L2 norm) of word vectors in the embedding space.
Intuition: Indicates the typical "length" of vectors. Consistent norms suggest stable training; high variance may indicate some words are undertrained.
What to seek: Relatively consistent norms across models. The absolute value matters less than consistency (low std deviation).
Cosine Similarity
Definition: Measures angular similarity between vectors, ranging from -1 (opposite) to 1 (identical direction).
Intuition: Words with similar meanings should have high cosine similarity. This is the standard metric for semantic relatedness in embeddings.
What to seek: Semantically related words should score > 0.5; unrelated words should be near 0. Synonyms often score > 0.7.
t-SNE Visualization
Definition: t-Distributed Stochastic Neighbor Embedding - a dimensionality reduction technique that preserves local structure for visualization.
Intuition: Clusters in t-SNE plots indicate groups of semantically related words. Spread indicates vocabulary diversity; tight clusters suggest semantic coherence.
What to seek: Meaningful clusters (e.g., numbers together, verbs together). Avoid over-interpreting distances - t-SNE preserves local, not global, structure.
General Interpretation Guidelines
- Compare within model families: Metrics are most meaningful when comparing models of the same type (e.g., 8k vs 64k tokenizer).
- Consider trade-offs: Better performance on one metric often comes at the cost of another (e.g., compression vs. OOV rate).
- Context matters: Optimal values depend on downstream tasks. Text generation may prioritize different metrics than classification.
- Corpus influence: All metrics are influenced by corpus characteristics. Wikipedia text differs from social media or literature.
- Language-specific patterns: Morphologically rich languages (like Arabic) may show different optimal ranges than analytic languages.
Visualizations Index
| Visualization | Description |
|---|---|
| Tokenizer Compression | Compression ratios by vocabulary size |
| Tokenizer Fertility | Average token length by vocabulary |
| Tokenizer OOV | Unknown token rates |
| Tokenizer Total Tokens | Total tokens by vocabulary |
| N-gram Perplexity | Perplexity by n-gram size |
| N-gram Entropy | Entropy by n-gram size |
| N-gram Coverage | Top pattern coverage |
| N-gram Unique | Unique n-gram counts |
| Markov Entropy | Entropy by context size |
| Markov Branching | Branching factor by context |
| Markov Contexts | Unique context counts |
| Zipf's Law | Frequency-rank distribution with fit |
| Vocab Frequency | Word frequency distribution |
| Top 20 Words | Most frequent words |
| Vocab Coverage | Cumulative coverage curve |
| Embedding Isotropy | Vector space uniformity |
| Embedding Norms | Vector magnitude distribution |
| Embedding Similarity | Word similarity heatmap |
| Nearest Neighbors | Similar words for key terms |
| t-SNE Words | 2D word embedding visualization |
| t-SNE Sentences | 2D sentence embedding visualization |
| Position Encoding | Encoding method comparison |
| Model Sizes | Storage requirements |
| Performance Dashboard | Comprehensive performance overview |
About This Project
Data Source
Models trained on wikipedia-monthly - a monthly snapshot of Wikipedia articles across 300+ languages.
Project
A project by Wikilangs - Open-source NLP models for every Wikipedia language.
Maintainer
Citation
If you use these models in your research, please cite:
@misc{wikilangs2025,
author = {Kamali, Omar},
title = {Wikilangs: Open NLP Models for Wikipedia Languages},
year = {2025},
doi = {10.5281/zenodo.18073153},
publisher = {Zenodo},
url = {https://huggingface.co/wikilangs}
institution = {Omneity Labs}
}
License
MIT License - Free for academic and commercial use.
Links
- π Website: wikilangs.org
- π€ Models: huggingface.co/wikilangs
- π Data: wikipedia-monthly
- π€ Author: Omar Kamali
- π€ Sponsor: Featherless AI
Generated by Wikilangs Models Pipeline
Report Date: 2026-01-04 03:05:37



















