Cornish - Wikilangs Models
Comprehensive Research Report & Full Ablation Study
This repository contains NLP models trained and evaluated by Wikilangs, specifically on Cornish 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 | 3.429x | 3.43 | 0.1065% | 186,869 |
| 16k | 3.721x | 3.73 | 0.1156% | 172,217 |
| 32k | 3.977x | 3.98 | 0.1235% | 161,115 |
| 64k | 4.173x π | 4.18 | 0.1296% | 153,552 |
Tokenization Examples
Below are sample sentences tokenized with each vocabulary size:
Sample 1: Arthur Ian Lavender (genys 16 mis Hwevrer yw gwarier sowsnek. bellwolok sowsnek ...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βarthur βian βlav ender β( genys β 1 6 βmis ... (+8 more) |
18 |
| 16k | βarthur βian βlav ender β( genys β 1 6 βmis ... (+8 more) |
18 |
| 32k | βarthur βian βlav ender β( genys β 1 6 βmis ... (+8 more) |
18 |
| 64k | βarthur βian βlavender β( genys β 1 6 βmis βhwevrer ... (+7 more) |
17 |
Sample 2: Christoph Waltz (genys 4 a vis Hedra yn Wien) yw gwarier almaynek hag ostrian. b...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βchrist oph βwalt z β( genys β 4 βa βvis ... (+18 more) |
28 |
| 16k | βchrist oph βwalt z β( genys β 4 βa βvis ... (+18 more) |
28 |
| 32k | βchristoph βwaltz β( genys β 4 βa βvis βhedra βyn ... (+15 more) |
25 |
| 64k | βchristoph βwaltz β( genys β 4 βa βvis βhedra βyn ... (+15 more) |
25 |
Sample 3: Sergei Pavlovich Korolev (12 mis Genver - 14 mis Genver o ynjynor fusen sovietek...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βser g ei βpav l ovich βkor ol ev β( ... (+16 more) |
26 |
| 16k | βserg ei βpav l ovich βkor ol ev β( 1 ... (+14 more) |
24 |
| 32k | βsergei βpavl ovich βkor ol ev β( 1 2 βmis ... (+12 more) |
22 |
| 64k | βsergei βpavlovich βkorolev β( 1 2 βmis βgenver β- β ... (+9 more) |
19 |
Key Findings
- Best Compression: 64k achieves 4.173x compression
- Lowest UNK Rate: 8k with 0.1065% 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 | 6,140 | 12.58 | 17,327 | 19.9% | 47.0% |
| 2-gram | Subword | 280 π | 8.13 | 3,069 | 65.7% | 99.2% |
| 3-gram | Word | 8,636 | 13.08 | 20,020 | 16.7% | 39.2% |
| 3-gram | Subword | 2,413 | 11.24 | 20,195 | 25.0% | 69.6% |
| 4-gram | Word | 12,101 | 13.56 | 28,809 | 15.8% | 36.0% |
| 4-gram | Subword | 13,333 | 13.70 | 96,993 | 11.0% | 37.3% |
| 5-gram | Word | 7,437 | 12.86 | 18,240 | 18.7% | 42.6% |
| 5-gram | Subword | 42,511 | 15.38 | 221,084 | 6.2% | 23.7% |
Top 5 N-grams by Size
2-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | y n |
3,849 |
| 2 | a n |
3,256 |
| 3 | dhe n |
2,209 |
| 4 | a veu |
1,834 |
| 5 | ev a |
1,712 |
3-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a dro dhe |
1,033 |
| 2 | yw tre yn |
711 |
| 3 | a wodhya kewsel |
679 |
| 4 | wodhya kewsel kembrek |
678 |
| 5 | km dhiworth loundres |
677 |
4-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a wodhya kewsel kembrek |
678 |
| 2 | kembra lleoedd canolfan bedwyr |
676 |
| 3 | km dhiworth kardydh ha |
676 |
| 4 | lleoedd canolfan bedwyr yma |
675 |
| 5 | canolfan bedwyr yma hi |
675 |
5-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | kembra lleoedd canolfan bedwyr yma |
675 |
| 2 | lleoedd canolfan bedwyr yma hi |
675 |
| 3 | a wodhya kewsel kembrek pednventydnyow |
674 |
| 4 | braster an poblans yn ha |
643 |
| 5 | o braster an poblans yn |
638 |
2-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | n _ |
116,444 |
| 2 | s _ |
97,434 |
| 3 | _ a |
94,959 |
| 4 | a _ |
91,201 |
| 5 | a n |
89,956 |
3-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a n _ |
39,084 |
| 2 | _ a n |
33,267 |
| 3 | o w _ |
30,057 |
| 4 | _ a _ |
27,654 |
| 5 | _ h a |
26,523 |
4-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | _ a n _ |
30,039 |
| 2 | _ y n _ |
20,330 |
| 3 | a n s _ |
16,203 |
| 4 | _ h a _ |
16,012 |
| 5 | _ d h e |
13,152 |
5-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | _ d h e _ |
8,088 |
| 2 | s _ a n _ |
5,747 |
| 3 | s _ y n _ |
5,446 |
| 4 | _ g a n s |
5,365 |
| 5 | g a n s _ |
5,220 |
Key Findings
- Best Perplexity: 2-gram (subword) with 280
- Entropy Trend: Decreases with larger n-grams (more predictable)
- Coverage: Top-1000 patterns cover ~24% 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 | 0.8579 | 1.812 | 5.27 | 68,677 | 14.2% |
| 1 | Subword | 0.8370 | 1.786 | 6.02 | 1,609 | 16.3% |
| 2 | Word | 0.2604 | 1.198 | 1.60 | 359,874 | 74.0% |
| 2 | Subword | 0.8174 | 1.762 | 4.63 | 9,678 | 18.3% |
| 3 | Word | 0.0856 | 1.061 | 1.14 | 570,742 | 91.4% |
| 3 | Subword | 0.7769 | 1.713 | 3.81 | 44,741 | 22.3% |
| 4 | Word | 0.0299 π | 1.021 | 1.05 | 648,256 | 97.0% |
| 4 | Subword | 0.6461 | 1.565 | 2.69 | 170,507 | 35.4% |
Generated Text Samples (Word-based)
Below are text samples generated from each word-based Markov chain model:
Context Size 1:
a lettyas nebes is ha tornyaseth yw Ε‘iprage map devy buhez mab nechtan cenΓ©l ngabrΓ‘in drean poblans an brassa niver a dro dhe rutheniom niver a wra medhogyon heb fugieth amerikanekyn asi yn afrika keskreunys a wra an ordinalia ha radn a melbost o 6 mis
Context Size 2:
y n seson segh hir hirder an kensa 10 perfydh besketh en istori amerika ΜΊ kansvledhen aa n omsav kregys veu parson korlan wosa omsav kethyon afrikan erbynn aga mesters frynkek an wlasdhe n golanes ev ew broder cy davyth fear skrifednyas an orsedh dyllys gans pab leo x
Context Size 3:
a dro dhe vewnans teylu rag ensampel demedhi a ji dhe n goos ankebmyn ew dhe n virusyw tre yn sir ddinbych kembra lleoedd canolfan bedwyr yma hi 47 9 mildir 77 km dhiworth kardydha wodhya kewsel kembrek pednventydnyow yn kembra kembra
Context Size 4:
a wodhya kewsel kembrek pednventydnyow yn kembra kembrakm dhiworth kardydh ha 150 7 m 242 6 km dhiworth loundres 235 o braster an poblans yn hakembra lleoedd canolfan bedwyr yma hi 47 3 mildir 76 1 km dhiworth kardydh ha 153 8 m 247
Generated Text Samples (Subword-based)
Below are text samples generated from each subword-based Markov chain model:
Context Size 1:
_owa_aglkedhaburerdyn_nten)_s_doaiem_ow,_y_46_au
Context Size 2:
n_miskriusys_ra_es_ani_hballs_gans_ascrott_en:_ΟΞΏΟ ,
Context Size 3:
an_a_bys_o_an_sewy_an_mygydnyow_doryow_boosdhe_dhe_dhe
Context Size 4:
_an_dowr_e'n_esel_s_yn_kodhasow_bygh_1ans_doemm_an_rebel.
Key Findings
- Best Predictability: Context-4 (word) with 97.0% predictability
- Branching Factor: Decreases with context size (more deterministic)
- Memory Trade-off: Larger contexts require more storage (170,507 contexts)
- Recommendation: Context-3 or Context-4 for text generation
4. Vocabulary Analysis
Statistics
| Metric | Value |
|---|---|
| Vocabulary Size | 30,471 |
| Total Tokens | 725,474 |
| Mean Frequency | 23.81 |
| Median Frequency | 4 |
| Frequency Std Dev | 361.46 |
Most Common Words
| Rank | Word | Frequency |
|---|---|---|
| 1 | a | 35,840 |
| 2 | an | 30,880 |
| 3 | yn | 21,945 |
| 4 | ha | 18,075 |
| 5 | n | 12,791 |
| 6 | yw | 12,421 |
| 7 | dhe | 10,462 |
| 8 | y | 10,232 |
| 9 | o | 6,009 |
| 10 | gans | 5,241 |
Least Common Words (from vocabulary)
| Rank | Word | Frequency |
|---|---|---|
| 1 | tinethy | 2 |
| 2 | chislehurst | 2 |
| 3 | pensions | 2 |
| 4 | gluthys | 2 |
| 5 | recayt | 2 |
| 6 | aunt | 2 |
| 7 | lyasow | 2 |
| 8 | calabresi | 2 |
| 9 | prinsipya | 2 |
| 10 | romanzo | 2 |
Zipf's Law Analysis
| Metric | Value |
|---|---|
| Zipf Coefficient | 1.0615 |
| RΒ² (Goodness of Fit) | 0.995825 |
| Adherence Quality | excellent |
Coverage Analysis
| Top N Words | Coverage |
|---|---|
| Top 100 | 41.6% |
| Top 1,000 | 67.7% |
| Top 5,000 | 85.0% |
| Top 10,000 | 91.5% |
Key Findings
- Zipf Compliance: RΒ²=0.9958 indicates excellent adherence to Zipf's law
- High Frequency Dominance: Top 100 words cover 41.6% of corpus
- Long Tail: 20,471 words needed for remaining 8.5% 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 | 0.8337 | 0.3251 | N/A | N/A |
| mono_64d | 64 | 0.5460 | 0.2971 | N/A | N/A |
| mono_128d | 128 | 0.1358 | 0.2890 | N/A | N/A |
| aligned_32d | 32 | 0.8337 π | 0.3307 | 0.0380 | 0.2340 |
| aligned_64d | 64 | 0.5460 | 0.2936 | 0.0580 | 0.2660 |
| aligned_128d | 128 | 0.1358 | 0.2812 | 0.0940 | 0.3220 |
Key Findings
- Best Isotropy: aligned_32d with 0.8337 (more uniform distribution)
- Semantic Density: Average pairwise similarity of 0.3028. Lower values indicate better semantic separation.
- Alignment Quality: Aligned models achieve up to 9.4% 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 | 0.802 | 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 |
|---|---|
-s |
sufi, sempelhes, surhe |
-d |
dolly, doeg, diskargans |
-a |
andy, amstyryus, aghskrifer |
-g |
gwiska, group, gwedhek |
-b |
bual, baronetage, barjavel |
-k |
kurΕ‘iΕ³, krestennogyon, keshevelyans |
-p |
peblys, provyans, pygmaea |
-t |
trohag, troha, tyghtya |
Productive Suffixes
| Suffix | Examples |
|---|---|
-s |
peblys, iseldiryekdedhyas, norvys |
-n |
chinkapin, elfyn, krestennogyon |
-ow |
megyansow, filmow, posow |
-w |
megyansow, filmow, wiw |
-a |
gwiska, bianna, wosa |
-k |
unnek, gwedhek, vywoniethek |
-on |
krestennogyon, menystroryon, kwarton |
-h |
babergh, bouddydh, priweyth |
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 |
|---|---|---|---|
skri |
1.99x | 54 contexts | skrif, skrij, skrin |
yans |
1.73x | 71 contexts | usyans, unyans, wayans |
krif |
1.92x | 27 contexts | skrif, skrift, skrifa |
eyth |
1.53x | 57 contexts | neyth, leyth, seyth |
anso |
2.04x | 20 contexts | ganso, kansow, sansom |
edhy |
1.53x | 54 contexts | hedhys, dedhya, anedhy |
nnow |
2.01x | 20 contexts | lynnow, donnow, vonnow |
nsow |
2.05x | 18 contexts | vynsow, kansow, ponsow |
ened |
1.92x | 17 contexts | wened, senedd, venedh |
edhe |
1.37x | 52 contexts | edhen, hedhew, wedhen |
lans |
1.65x | 26 contexts | plans, blans, kalans |
dhya |
1.53x | 32 contexts | dedhya, tydhya, tedhya |
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.
| Prefix | Suffix | Frequency | Examples |
|---|---|---|---|
-d |
-s |
189 words | definys, dielvednans |
-g |
-s |
98 words | gevres, glaucoides |
-k |
-s |
90 words | kows, kerwys |
-k |
-w |
80 words | krow, kalenderyow |
-p |
-s |
79 words | pleasants, porpos |
-k |
-ow |
78 words | krow, kalenderyow |
-d |
-ns |
75 words | dielvednans, dhielvennans |
-a |
-s |
73 words | antarcticus, arvreusyas |
-s |
-s |
70 words | skwattys, shackys |
-t |
-s |
69 words | tredhinas, trehevis |
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 |
|---|---|---|---|
| politikel | politi-k-el |
7.5 | k |
| lanndreth | lannd-re-th |
7.5 | re |
| degvledhen | de-g-vledhen |
7.5 | vledhen |
| anserhogath | anserhog-a-th |
7.5 | a |
| harryhausen | harryhau-s-en |
7.5 | s |
| haakonsson | haakons-s-on |
7.5 | s |
| klavjiores | klavjio-r-es |
7.5 | r |
| daskorrys | da-skorr-ys |
6.0 | skorr |
| sewyansow | sewya-ns-ow |
6.0 | sewya |
| fondyansow | fondya-ns-ow |
6.0 | fondya |
| tetroksid | te-tr-oksid |
6.0 | oksid |
| wordhonek | wordh-on-ek |
6.0 | wordh |
| gonisogethel | gonisogeth-el |
4.5 | gonisogeth |
| delinyans | delinya-ns |
4.5 | delinya |
| guntellas | guntella-s |
4.5 | guntella |
6.6 Linguistic Interpretation
Automated Insight: The language Cornish shows high morphological productivity. The subword models are significantly more efficient than word models, suggesting a rich system of affixation or compounding.
Note on Idiomaticity: The high Idiomaticity Gap suggests a large number of frequent multi-word expressions or formulaic sequences that are statistically distinct from their component parts.
7. Summary & Recommendations
Production Recommendations
| Component | Recommended | Rationale |
|---|---|---|
| Tokenizer | 64k BPE | Best compression (4.17x) |
| N-gram | 2-gram | Lowest perplexity (280) |
| Markov | Context-4 | Highest predictability (97.0%) |
| 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: 2026-01-10 08:58:14



















