Crimean Tatar - Wikilangs Models

Comprehensive Research Report & Full Ablation Study

This repository contains NLP models trained and evaluated by Wikilangs, specifically on Crimean Tatar Wikipedia data. We analyze tokenizers, n-gram models, Markov chains, vocabulary statistics, and word embeddings.

πŸ“‹ 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

Performance Dashboard

Analysis and Evaluation


1. Tokenizer Evaluation

Tokenizer Compression

Tokenizer Fertility

Tokenizer OOV

Total Tokens

Results

Vocab Size Compression Avg Token Len UNK Rate Total Tokens
8k 3.646x 3.65 0.2038% 212,471
16k 4.078x 4.08 0.2279% 189,960
32k 4.457x 4.46 0.2492% 173,772
64k 4.779x πŸ† 4.79 0.2672% 162,079

Tokenization Examples

Below are sample sentences tokenized with each vocabulary size:

Sample 1: İslanovo () - Rusiyede, Başqırtistan Cumhuriyetiniñ Kuşnarenko rayonında bir kây...

Vocab Tokens Count
8k ▁İs lan ovo ▁() ▁- ▁rusiyede , ▁başqΔ±rtistan ▁cumhuriyetiniΓ± ▁kuşnarenko ... (+13 more) 23
16k ▁İs lanovo ▁() ▁- ▁rusiyede , ▁başqΔ±rtistan ▁cumhuriyetiniΓ± ▁kuşnarenko ▁rayonΔ±nda ... (+12 more) 22
32k ▁İs lanovo ▁() ▁- ▁rusiyede , ▁başqΔ±rtistan ▁cumhuriyetiniΓ± ▁kuşnarenko ▁rayonΔ±nda ... (+12 more) 22
64k ▁İslanovo ▁() ▁- ▁rusiyede , ▁başqΔ±rtistan ▁cumhuriyetiniΓ± ▁kuşnarenko ▁rayonΔ±nda ▁bir ... (+11 more) 21

Sample 2: Drujbivka () - UkrainanΔ±Γ± JΔ±tomΔ±r vilΓ’yetinde Korosten rayonΔ±nda bir kΓΆy. Ealisi...

Vocab Tokens Count
8k ▁druj bivka ▁() ▁- ▁ukrainanΔ±Γ± ▁jΔ±tomΔ±r ▁vilΓ’yetinde ▁korosten ▁rayonΔ±nda ▁bir ... (+12 more) 22
16k ▁druj bivka ▁() ▁- ▁ukrainanΔ±Γ± ▁jΔ±tomΔ±r ▁vilΓ’yetinde ▁korosten ▁rayonΔ±nda ▁bir ... (+12 more) 22
32k ▁druj bivka ▁() ▁- ▁ukrainanΔ±Γ± ▁jΔ±tomΔ±r ▁vilΓ’yetinde ▁korosten ▁rayonΔ±nda ▁bir ... (+12 more) 22
64k ▁drujbivka ▁() ▁- ▁ukrainanΔ±Γ± ▁jΔ±tomΔ±r ▁vilΓ’yetinde ▁korosten ▁rayonΔ±nda ▁bir ▁kΓΆy ... (+11 more) 21

Sample 3: Koltunovka () - RusiyeniΓ± Belgorod vilΓ’yetinde, Alekseyevka rayonΔ±nda bir kΓΆy. E...

Vocab Tokens Count
8k ▁kol tun ovka ▁() ▁- ▁rusiyeniΓ± ▁belgorod ▁vilΓ’yetinde , ▁alekseyevka ... (+15 more) 25
16k ▁kol tun ovka ▁() ▁- ▁rusiyeniΓ± ▁belgorod ▁vilΓ’yetinde , ▁alekseyevka ... (+15 more) 25
32k ▁kol tun ovka ▁() ▁- ▁rusiyeniΓ± ▁belgorod ▁vilΓ’yetinde , ▁alekseyevka ... (+15 more) 25
64k ▁koltunovka ▁() ▁- ▁rusiyeniΓ± ▁belgorod ▁vilΓ’yetinde , ▁alekseyevka ▁rayonΔ±nda ▁bir ... (+13 more) 23

Key Findings

  • Best Compression: 64k achieves 4.779x compression
  • Lowest UNK Rate: 8k with 0.2038% 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

N-gram Perplexity

N-gram Unique

N-gram Coverage

Results

N-gram Variant Perplexity Entropy Unique N-grams Top-100 Coverage Top-1000 Coverage
2-gram Word 849 9.73 10,213 56.1% 74.4%
2-gram Subword 348 πŸ† 8.44 3,878 63.4% 98.0%
3-gram Word 1,276 10.32 13,301 49.1% 71.8%
3-gram Subword 2,220 11.12 29,221 33.1% 71.8%
4-gram Word 4,190 12.03 31,513 31.9% 54.7%
4-gram Subword 7,833 12.94 131,199 26.0% 52.3%
5-gram Word 6,061 12.57 29,487 24.1% 48.5%
5-gram Subword 16,690 14.03 285,107 23.4% 46.1%

Top 5 N-grams by Size

2-grams (Word):

Rank N-gram Count
1 ealisiniΓ± sayΔ±sΔ± 20,740
2 rayonΔ±nda bir 17,352
3 meskΓΌn yerler 12,883
4 bir kΓΆy 10,061
5 kΓΆy ealisiniΓ± 9,139

3-grams (Word):

Rank N-gram Count
1 rayonΔ±nda bir kΓΆy 9,314
2 bir kΓΆy ealisiniΓ± 9,139
3 kΓΆy ealisiniΓ± sayΔ±sΔ± 9,139
4 rayonΔ±ndaki meskΓΌn yerler 5,591
5 kişi meskün yerler 4,604

4-grams (Word):

Rank N-gram Count
1 bir kΓΆy ealisiniΓ± sayΔ±sΔ± 9,139
2 rayonΔ±nda bir kΓΆy ealisiniΓ± 8,985
3 bir kΓΆydir ealisiniΓ± sayΔ±sΔ± 4,601
4 rayonΔ±nda bir kΓΆydir ealisiniΓ± 4,565
5 i̇htar rayonındaki meskün yerler 3,615

5-grams (Word):

Rank N-gram Count
1 rayonΔ±nda bir kΓΆy ealisiniΓ± sayΔ±sΔ± 8,985
2 rayonΔ±nda bir kΓΆydir ealisiniΓ± sayΔ±sΔ± 4,565
3 kişi iΜ‡htar rayonΔ±ndaki meskΓΌn yerler 2,558
4 asırnıñ bir senesi vaqialar doğumlar 1,996
5 bir senesi vaqialar doğumlar âlümler 1,917

2-grams (Subword):

Rank N-gram Count
1 i n 101,089
2 e r 95,398
3 a _ 88,613
4 r _ 84,598
5 . _ 80,856

3-grams (Subword):

Rank N-gram Count
1 i Γ± _ 43,406
2 n i Γ± 42,914
3 l e r 42,891
4 n d e 35,848
5 e t i 35,643

4-grams (Subword):

Rank N-gram Count
1 n i Γ± _ 42,657
2 i n d e 34,217
3 y e t i 30,830
4 Δ± n d a 30,087
5 _ b i r 29,643

5-grams (Subword):

Rank N-gram Count
1 i n i Γ± _ 28,194
2 y e t i n 28,057
3 _ b i r _ 27,628
4 r a y o n 26,921
5 _ r a y o 26,900

Key Findings

  • Best Perplexity: 2-gram (subword) with 348
  • Entropy Trend: Decreases with larger n-grams (more predictable)
  • Coverage: Top-1000 patterns cover ~46% of corpus
  • Recommendation: 4-gram or 5-gram for best predictive performance

3. Markov Chain Evaluation

Markov Entropy

Markov Contexts

Markov Branching

Results

Context Variant Avg Entropy Perplexity Branching Factor Unique Contexts Predictability
1 Word 0.6244 1.542 2.99 128,666 37.6%
1 Subword 0.8852 1.847 6.85 1,505 11.5%
2 Word 0.1302 1.094 1.24 383,467 87.0%
2 Subword 0.9025 1.869 5.57 10,300 9.7%
3 Word 0.0387 1.027 1.07 474,016 96.1%
3 Subword 0.8153 1.760 3.87 57,358 18.5%
4 Word 0.0242 πŸ† 1.017 1.05 502,796 97.6%
4 Subword 0.6069 1.523 2.54 221,948 39.3%

Generated Text Samples (Word-based)

Below are text samples generated from each word-based Markov chain model:

Context Size 1:

  1. bir cemaatı ukrainanıñ jıtomır vilÒyetinde olevsk rayonında bir şeer şeklinde qasabalar vahruşev nog...
  2. kişi rayonındaki meskün yerler kâyler abatskoye rusiyeniñ hantı mansi muhtar cumhuriyetinıñ devlet g...
  3. sayısı 0 kişi meskün yerler veloturizm iklim deñişmelerine çoq yüklü yükni yükniñ yüksek mâlekulÒr o...

Context Size 2:

  1. ealisiniñ sayısı kişi senesi vilÒyetindeki qasabalar
  2. rayonΔ±nda bir aul adΔ±ge habl calancΓΌk kiΓ§ik iΜ‡ncik kavkazskiy pregradna ΓΌΓ§kΓΆken habez erkin şeer rus...
  3. bir kây oktÒbr rayonınıñ merkezi ealisiniñ sayısı 202 939 kişi senesi atıflar rayonındaki meskün yer...

Context Size 3:

  1. rayonında bir kây ealisiniñ sayısı 394 kişi senesi atıflar rayonındaki meskün yerler kâyler atıflar ...
  2. bir kΓΆy ealisiniΓ± sayΔ±sΔ± 593 kişi iΜ‡htar rayonΔ±ndaki meskΓΌn yerler kΓΆyler atΔ±flar rayonΔ±ndaki meskΓΌn...
  3. kây ealisiniñ sayısı 828 kişi vilÒyetindeki meskün yerler

Context Size 4:

  1. bir kây ealisiniñ sayısı kişi vilÒyetindeki meskün yerler
  2. rayonında bir kây ealisiniñ sayısı 134 kişi vilÒyetindeki meskün yerler
  3. bir kΓΆydir ealisiniΓ± sayΔ±sΔ± 25 kişi iΜ‡htar rayonΔ±ndaki meskΓΌn yerler vilΓ’yetindeki şeer şeklinde qas...

Generated Text Samples (Subword-based)

Below are text samples generated from each subword-based Markov chain model:

Context Size 1:

  1. _()_-_qmΔ±_mi._be
  2. ariraye_altviyΓΌr
  3. i._bişekayay._()

Context Size 2:

  1. iniv-ufterlar,_ad
  2. a_balisiyentΔ±lari
  3. r_rusiyetingrayΔ±s

Context Size 3:

  1. iΓ±_sayΔ±sΔ±_591_belg
  2. niΓ±_sayΔ±sΔ±_kir._ea
  3. nde_dinde_ΓΆgrendi_

Context Size 4:

  1. niΓ±_noviΓ§i_bar._cev
  2. inde_kontsev_artemi
  3. yetinde_bir_qast_ma

Key Findings

  • Best Predictability: Context-4 (word) with 97.6% predictability
  • Branching Factor: Decreases with context size (more deterministic)
  • Memory Trade-off: Larger contexts require more storage (221,948 contexts)
  • Recommendation: Context-3 or Context-4 for text generation

4. Vocabulary Analysis

Zipf's Law

Top Words

Coverage Curve

Statistics

Metric Value
Vocabulary Size 51,458
Total Tokens 776,471
Mean Frequency 15.09
Median Frequency 3
Frequency Std Dev 272.01

Most Common Words

Rank Word Frequency
1 bir 27,753
2 kişi 20,857
3 sayΔ±sΔ± 20,821
4 ealisiniΓ± 20,770
5 rayonΔ±nda 17,392
6 meskΓΌn 13,506
7 yerler 12,926
8 vilΓ’yetinde 12,440
9 kΓΆy 10,901
10 rusiyeniΓ± 9,597

Least Common Words (from vocabulary)

Rank Word Frequency
1 зиядС 2
2 atalarnΔ±Γ± 2
3 kotsubΔ±nskΔ±ylar 2
4 yΓΌneskonΔ±Γ± 2
5 Ψ―ΫŒΩ„Ω„Ψ± 2
6 ازبری 2
7 Ψ§ΩˆΩ„Ψ§Ω† 2
8 Ψ³Ψ§Ω…Ψ§Ω†Ϊ†ΫŒ 2
9 Ω‚ΫŒΨ²ΫŒ 2
10 samanΓ§Δ± 2

Zipf's Law Analysis

Metric Value
Zipf Coefficient 0.9856
RΒ² (Goodness of Fit) 0.998043
Adherence Quality excellent

Coverage Analysis

Top N Words Coverage
Top 100 45.6%
Top 1,000 63.8%
Top 5,000 78.2%
Top 10,000 84.4%

Key Findings

  • Zipf Compliance: RΒ²=0.9980 indicates excellent adherence to Zipf's law
  • High Frequency Dominance: Top 100 words cover 45.6% of corpus
  • Long Tail: 41,458 words needed for remaining 15.6% coverage

5. Word Embeddings Evaluation

Embedding Isotropy

Similarity Matrix

t-SNE Words

t-SNE Sentences

5.1 Cross-Lingual Alignment

Alignment Quality

Multilingual t-SNE

5.2 Model Comparison

Model Dimension Isotropy Semantic Density Alignment R@1 Alignment R@10
mono_32d 32 0.7031 πŸ† 0.3722 N/A N/A
mono_64d 64 0.4233 0.3424 N/A N/A
mono_128d 128 0.1068 0.3377 N/A N/A
aligned_32d 32 0.7031 0.3786 0.0140 0.1600
aligned_64d 64 0.4233 0.3386 0.0380 0.2140
aligned_128d 128 0.1068 0.3419 0.0560 0.2680

Key Findings

  • Best Isotropy: mono_32d with 0.7031 (more uniform distribution)
  • Semantic Density: Average pairwise similarity of 0.3519. Lower values indicate better semantic separation.
  • Alignment Quality: Aligned models achieve up to 5.6% 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 0.052 Low formulaic 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
-a terehova, biΓ§ura, observatoriya
-ka novosΓΆlka, alekseyevka, kapustΓ’nka
-vo korolΓΆvo, semenovo, hetovo
-vka alekseyevka, dolgalovka, svetlovka
-an turan, birobican, adlandırğan
-ovo semenovo, hetovo, panfilovo
-ye zapolnoye, smelΔ±ye, voznesenskoye
-en keΓ§irmegen, nevbetten, neogen

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
leri 1.60x 110 contexts ileri, lerik, galeri
rler 1.60x 57 contexts erler, yerler, derler
siye 2.05x 21 contexts asiye, rusiye, tevsiye
isin 1.57x 31 contexts episine, kerisin, reisini
iniΓ± 1.64x 26 contexts eviniΓ±, iliniΓ±, eliniΓ±
nesi 1.64x 22 contexts nesib, nesil, nesir
eniΓ± 1.75x 16 contexts seniΓ±, heniΓ±, ekeniΓ±
usiy 2.11x 9 contexts lusiya, rusiye, hususiy
lΓ’ye 1.87x 11 contexts belΓ’yev, gulΓ’yev, vilΓ’yet
Òyet 1.87x 11 contexts menÒyet, vilÒyet, şikÒyet
sini 1.70x 14 contexts siniy, sinip, aksini
yeti 1.59x 17 contexts yetip, yetim, yetişe

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
gazetanen gazet-an-en 6.0 gazet
ananyevka anan-ye-vka 6.0 anan
petrusnΔ±Γ± petrus-nΔ±Γ± 4.5 petrus
vesiqalarΔ±nΔ±Γ± vesiqalarΔ±-nΔ±Γ± 4.5 vesiqalarΔ±
nikiforovo nikifor-ovo 4.5 nikifor
sistemasΔ±nΔ±Γ± sistemasΔ±-nΔ±Γ± 4.5 sistemasΔ±
qΔ±sΔ±mlarΔ±nΔ±Γ± qΔ±sΔ±mlarΔ±-nΔ±Γ± 4.5 qΔ±sΔ±mlarΔ±
borispolye borispol-ye 4.5 borispol
programmanΔ±Γ± programma-nΔ±Γ± 4.5 programma
gotlarnΔ±Γ± gotlar-nΔ±Γ± 4.5 gotlar
qadΔ±lΔ±qnΔ±Γ± qadΔ±lΔ±q-nΔ±Γ± 4.5 qadΔ±lΔ±q
kopelΓ’nka kopelΓ’n-ka 4.5 kopelΓ’n
mahsulatlarnΔ±Γ± mahsulatlar-nΔ±Γ± 4.5 mahsulatlar
nigeriyanΔ±Γ± nigeriya-nΔ±Γ± 4.5 nigeriya
qasabanΔ±Γ± qasaba-nΔ±Γ± 4.5 qasaba

6.6 Linguistic Interpretation

Automated Insight: The language Crimean Tatar 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

Performance Dashboard

Production Recommendations

Component Recommended Rationale
Tokenizer 64k BPE Best compression (4.78x)
N-gram 2-gram Lowest perplexity (348)
Markov Context-4 Highest predictability (97.6%)
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

  1. Compare within model families: Metrics are most meaningful when comparing models of the same type (e.g., 8k vs 64k tokenizer).
  2. Consider trade-offs: Better performance on one metric often comes at the cost of another (e.g., compression vs. OOV rate).
  3. Context matters: Optimal values depend on downstream tasks. Text generation may prioritize different metrics than classification.
  4. Corpus influence: All metrics are influenced by corpus characteristics. Wikipedia text differs from social media or literature.
  5. 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

Omar Kamali - Omneity Labs

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


Generated by Wikilangs Models Pipeline

Report Date: 2026-01-03 20:48:59

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Dataset used to train wikilangs/crh