Manx - Wikilangs Models
Comprehensive Research Report & Full Ablation Study
This repository contains NLP models trained and evaluated by Wikilangs, specifically on Manx 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 | 3.783x | 3.79 | 0.1096% | 245,339 |
| 16k | 4.045x | 4.05 | 0.1173% | 229,410 |
| 32k | 4.238x | 4.24 | 0.1229% | 218,965 |
| 64k | 4.366x π | 4.37 | 0.1266% | 212,544 |
Tokenization Examples
Below are sample sentences tokenized with each vocabulary size:
Sample 1: She nane jeh rheynnyn y Rank ee Mor-Bihan (). Ta'n rheynn soit 'sy Vritaan. y Ra...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βshe βnane βjeh βrheynnyn βy βrank βee βmor - bihan ... (+12 more) |
22 |
| 16k | βshe βnane βjeh βrheynnyn βy βrank βee βmor - bihan ... (+12 more) |
22 |
| 32k | βshe βnane βjeh βrheynnyn βy βrank βee βmor - bihan ... (+12 more) |
22 |
| 64k | βshe βnane βjeh βrheynnyn βy βrank βee βmor - bihan ... (+12 more) |
22 |
Sample 2: Blein: - (MDCCCLVII) - Taghyrtyn Ruggyryn 15 Mean Fouyir - William H. Taft, 27oo...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βblein : β- β( mdcc cl vii ) β- βtaghyrtyn ... (+25 more) |
35 |
| 16k | βblein : β- β( mdcccl vii ) β- βtaghyrtyn βruggyryn ... (+24 more) |
34 |
| 32k | βblein : β- β( mdcccl vii ) β- βtaghyrtyn βruggyryn ... (+23 more) |
33 |
| 64k | βblein : β- β( mdccclvii ) β- βtaghyrtyn βruggyryn β ... (+22 more) |
32 |
Sample 3: Feaillaghyn Taghyrtyn Ruggyryn Baaseyn Jerrey Geuree, 30 30
| Vocab | Tokens | Count |
|---|---|---|
| 8k | βfeaillaghyn βtaghyrtyn βruggyryn βbaaseyn βjerrey βgeuree , β 3 0 ... (+3 more) |
13 |
| 16k | βfeaillaghyn βtaghyrtyn βruggyryn βbaaseyn βjerrey βgeuree , β 3 0 ... (+3 more) |
13 |
| 32k | βfeaillaghyn βtaghyrtyn βruggyryn βbaaseyn βjerrey βgeuree , β 3 0 ... (+3 more) |
13 |
| 64k | βfeaillaghyn βtaghyrtyn βruggyryn βbaaseyn βjerrey βgeuree , β 3 0 ... (+3 more) |
13 |
Key Findings
- Best Compression: 64k achieves 4.366x compression
- Lowest UNK Rate: 8k with 0.1096% 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 | 8,764 | 13.10 | 27,165 | 17.3% | 42.4% |
| 2-gram | Subword | 267 π | 8.06 | 3,213 | 67.9% | 99.3% |
| 3-gram | Word | 18,876 | 14.20 | 39,871 | 9.1% | 28.2% |
| 3-gram | Subword | 2,139 | 11.06 | 23,013 | 26.3% | 72.8% |
| 4-gram | Word | 32,610 | 14.99 | 58,839 | 6.7% | 21.0% |
| 4-gram | Subword | 10,768 | 13.39 | 112,078 | 13.7% | 41.9% |
| 5-gram | Word | 22,648 | 14.47 | 37,341 | 7.2% | 23.3% |
| 5-gram | Subword | 32,659 | 15.00 | 257,320 | 8.0% | 28.3% |
Top 5 N-grams by Size
2-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | sy vlein |
5,442 |
| 2 | ta n |
4,504 |
| 3 | ny h |
3,395 |
| 4 | t eh |
3,265 |
| 5 | er y |
2,744 |
3-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | ny steatyn unnaneysit |
1,092 |
| 2 | imraaghyn kianglaghyn magh |
1,051 |
| 3 | sy vlein vio |
912 |
| 4 | y chooid smoo |
815 |
| 5 | sy vlein sy |
753 |
4-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | sy vlein sy vlein |
663 |
| 2 | kianglaghyn magh sy vlein |
600 |
| 3 | magh sy vlein vio |
492 |
| 4 | son y chooid smoo |
460 |
| 5 | imraaghyn kianglaghyn magh sy |
359 |
5-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | kianglaghyn magh sy vlein vio |
489 |
| 2 | imraaghyn kianglaghyn magh sy vlein |
340 |
| 3 | as thallooyn bunnit sy vlein |
330 |
| 4 | currit er cummaltee yn valley |
210 |
| 5 | ayns sheear hwoaie ny frank |
191 |
2-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | n _ |
162,079 |
| 2 | y _ |
140,625 |
| 3 | g h |
135,289 |
| 4 | a g |
129,114 |
| 5 | y n |
125,587 |
3-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a g h |
115,774 |
| 2 | y n _ |
80,040 |
| 3 | g h _ |
63,973 |
| 4 | e y _ |
47,584 |
| 5 | _ a s |
40,866 |
4-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a g h _ |
62,613 |
| 2 | _ a s _ |
33,690 |
| 3 | _ n y _ |
30,730 |
| 4 | n a g h |
26,067 |
| 5 | _ a y n |
22,053 |
5-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a y n s _ |
20,378 |
| 2 | _ a y n s |
20,257 |
| 3 | n a g h _ |
19,764 |
| 4 | _ ' s y _ |
13,703 |
| 5 | a g h y n |
11,504 |
Key Findings
- Best Perplexity: 2-gram (subword) with 267
- Entropy Trend: Decreases with larger n-grams (more predictable)
- Coverage: Top-1000 patterns cover ~28% 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 | 0.9102 | 1.879 | 6.06 | 78,553 | 9.0% |
| 1 | Subword | 1.0148 | 2.021 | 7.60 | 1,229 | 0.0% |
| 2 | Word | 0.2842 | 1.218 | 1.71 | 474,494 | 71.6% |
| 2 | Subword | 0.8801 | 1.840 | 5.16 | 9,341 | 12.0% |
| 3 | Word | 0.1148 | 1.083 | 1.21 | 805,921 | 88.5% |
| 3 | Subword | 0.7972 | 1.738 | 4.02 | 48,186 | 20.3% |
| 4 | Word | 0.0492 π | 1.035 | 1.08 | 971,794 | 95.1% |
| 4 | Subword | 0.6574 | 1.577 | 2.76 | 193,482 | 34.3% |
Generated Text Samples (Word-based)
Below are text samples generated from each word-based Markov chain model:
Context Size 1:
as chur undinyssyn argidoil ta n abbyrlhit romanagh Γ§hengaghyn elley ayns pobblaght hoveidjagh va ca...ny henn wheiggaghyn gorzΓ³w wielkopolski as y theihll slane ayns fockleyr aahoilshit ayns wilmington ...y gogledd ny caslys syn ookraan saint cyndeyrn ap gwilym jenkins john hewlett packard johnny morris
Context Size 2:
sy vlein y reeriaght stiagh ayns e ynnyd fea jerrinagh ayns karacteyr aghteyr yn shayll ray kellyta n ennym eck ayns soilsheenyn Γ§hellveeish as scannane yernagh lunnin as barrantee aachaptanys eche...ny h ellanyn phillippeenagh maputo yn preeu valley tradishoonagh imraaghyn jesh chliaghtagh hostyn h...
Context Size 3:
ny steatyn unnaneysit lesh y talvador lesh y teer lesh y terb lesh yn ungaar caggee lesh yimraaghyn kianglaghyn magh the deep photographic guide to the butterflies of britain and europe harp...sy vlein vio firryn faaroagh
Context Size 4:
sy vlein sy vlein bentyn rish y chapitlaghys bentyn rish rheynn verΓ§hys lesh adam smith classicagh t...kianglaghyn magh sy vlein vio soccer firryn bretnagh wigan athletic f c bradford city a f c as wrexh...magh sy vlein vio ass los angeles ass california fillym bwoirrin americaanagh fillym bwoirrin americ...
Generated Text Samples (Subword-based)
Below are text samples generated from each subword-based Markov chain model:
Context Size 1:
_d-ots_c_l_sh_ebahlee)_bhtoiodaseamh_y_owat_meee
Context Size 2:
n_huleanco-hagh_ey_as_rush_veeal_aghticadjeant_momb
Context Size 3:
agh_drey-lettys_dyyn_ec_y_romwelyn_egh_yn_eh_myr_ger_e
Context Size 4:
agh_treeockleyn_spo_as_ontae_ghow_ee_s_ny_griff_john_fock
Key Findings
- Best Predictability: Context-4 (word) with 95.1% predictability
- Branching Factor: Decreases with context size (more deterministic)
- Memory Trade-off: Larger contexts require more storage (193,482 contexts)
- Recommendation: Context-3 or Context-4 for text generation
4. Vocabulary Analysis
Statistics
| Metric | Value |
|---|---|
| Vocabulary Size | 35,254 |
| Total Tokens | 1,132,292 |
| Mean Frequency | 32.12 |
| Median Frequency | 4 |
| Frequency Std Dev | 426.46 |
Most Common Words
| Rank | Word | Frequency |
|---|---|---|
| 1 | as | 34,141 |
| 2 | ny | 31,248 |
| 3 | y | 29,520 |
| 4 | er | 22,963 |
| 5 | ayns | 20,469 |
| 6 | ta | 20,110 |
| 7 | yn | 17,952 |
| 8 | sy | 13,978 |
| 9 | n | 13,453 |
| 10 | eh | 12,232 |
Least Common Words (from vocabulary)
| Rank | Word | Frequency |
|---|---|---|
| 1 | alnair | 2 |
| 2 | rollageydyr | 2 |
| 3 | mirfak | 2 |
| 4 | notations | 2 |
| 5 | assembly | 2 |
| 6 | equulei | 2 |
| 7 | doradus | 2 |
| 8 | reticuli | 2 |
| 9 | sextantis | 2 |
| 10 | asteraghtyn | 2 |
Zipf's Law Analysis
| Metric | Value |
|---|---|
| Zipf Coefficient | 1.1436 |
| RΒ² (Goodness of Fit) | 0.995856 |
| Adherence Quality | excellent |
Coverage Analysis
| Top N Words | Coverage |
|---|---|
| Top 100 | 42.2% |
| Top 1,000 | 71.1% |
| Top 5,000 | 87.0% |
| Top 10,000 | 92.4% |
Key Findings
- Zipf Compliance: RΒ²=0.9959 indicates excellent adherence to Zipf's law
- High Frequency Dominance: Top 100 words cover 42.2% of corpus
- Long Tail: 25,254 words needed for remaining 7.6% 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 | 0.8673 | 0.3548 | N/A | N/A |
| mono_64d | 64 | 0.8292 | 0.2688 | N/A | N/A |
| mono_128d | 128 | 0.6512 | 0.2218 | N/A | N/A |
| aligned_32d | 32 | 0.8673 π | 0.3561 | 0.0820 | 0.3820 |
| aligned_64d | 64 | 0.8292 | 0.2710 | 0.1420 | 0.4640 |
| aligned_128d | 128 | 0.6512 | 0.2269 | 0.1940 | 0.5460 |
Key Findings
- Best Isotropy: aligned_32d with 0.8673 (more uniform distribution)
- Semantic Density: Average pairwise similarity of 0.2832. Lower values indicate better semantic separation.
- Alignment Quality: Aligned models achieve up to 19.4% 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 | -0.175 | 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 |
|---|---|
-ch |
children, choontys, chartvelagh |
-co |
colleishyn, cooidjagh, conmhaΓcne |
Productive Suffixes
| Suffix | Examples |
|---|---|
-n |
keirdlannyn, cullen, carradjeyn |
-yn |
keirdlannyn, carradjeyn, cluicyn |
-gh |
ennaghtagh, cooidjagh, frangagh |
-agh |
ennaghtagh, cooidjagh, frangagh |
-ey |
morrey, gerrey, unnaneyssey |
-er |
better, xavier, challenger |
-ys |
ghooghys, vraaraghys, choontys |
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 |
|---|---|---|---|
aghe |
2.02x | 61 contexts | baghey, magher, baghee |
aghy |
1.87x | 76 contexts | aghyn, baghyl, daghyr |
lley |
1.88x | 72 contexts | ulley, olley, alley |
ghey |
1.92x | 42 contexts | gheyr, baghey, gheyre |
llag |
1.57x | 90 contexts | ollagh, kallag, mollag |
anag |
1.78x | 47 contexts | anagh, ganagh, managh |
eeag |
1.76x | 46 contexts | eeagh, veeagh, keeagh |
eagh |
1.49x | 89 contexts | reagh, leagh, eaght |
lagh |
1.48x | 90 contexts | clagh, glagh, aalagh |
rrey |
1.75x | 41 contexts | arrey, murrey, girrey |
aagh |
1.58x | 55 contexts | saagh, haagh, aaght |
erre |
1.83x | 24 contexts | erree, merre, terre |
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 |
|---|---|---|---|
-ch |
-n |
49 words | chragheyderyn, chapman |
-ch |
-gh |
40 words | chlogh, chollaigh |
-co |
-n |
38 words | coloin, collooghyn |
-ch |
-agh |
36 words | charolingagh, chondaigagh |
-co |
-gh |
30 words | cosmaidagh, corralagh |
-co |
-yn |
28 words | collooghyn, cocoonyn |
-co |
-agh |
26 words | cosmaidagh, corralagh |
-ch |
-yn |
23 words | chragheyderyn, cheirdyn |
-ch |
-ey |
15 words | chohirrey, chiangley |
-ch |
-er |
11 words | chooidjeyder, character |
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 |
|---|---|---|---|
| shennaghyn | shenn-agh-yn |
6.0 | shenn |
| mishaghey | mish-agh-ey |
6.0 | mish |
| nieuaghey | nieu-agh-ey |
6.0 | nieu |
| strooghyn | stroo-gh-yn |
6.0 | stroo |
| buighaghey | buigh-agh-ey |
6.0 | buigh |
| Γ§hynskylaghey | Γ§hynskyl-agh-ey |
6.0 | Γ§hynskyl |
| troailtaghey | troailt-agh-ey |
6.0 | troailt |
| cruinnaghyn | cruinn-agh-yn |
6.0 | cruinn |
| skeayllaghyn | skeayll-agh-yn |
6.0 | skeayll |
| obbyraghyn | obbyr-agh-yn |
6.0 | obbyr |
| cohoyrtagh | co-hoyrt-agh |
6.0 | hoyrt |
| coheshaghtys | co-heshaght-ys |
6.0 | heshaght |
| sheelaghey | sheel-agh-ey |
6.0 | sheel |
| moanaghey | moan-agh-ey |
6.0 | moan |
| skynnaghyn | skynn-agh-yn |
6.0 | skynn |
6.6 Linguistic Interpretation
Automated Insight: The language Manx 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 | 64k BPE | Best compression (4.37x) |
| N-gram | 2-gram | Lowest perplexity (267) |
| Markov | Context-4 | Highest predictability (95.1%) |
| 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: 2026-01-10 00:44:21



















