language: lad
language_name: Ladino
language_family: semitic_hebrew
tags:
- wikilangs
- nlp
- tokenizer
- embeddings
- n-gram
- markov
- wikipedia
- feature-extraction
- sentence-similarity
- tokenization
- n-grams
- markov-chain
- text-mining
- fasttext
- babelvec
- vocabulous
- vocabulary
- monolingual
- family-semitic_hebrew
license: mit
library_name: wikilangs
pipeline_tag: text-generation
datasets:
- omarkamali/wikipedia-monthly
dataset_info:
name: wikipedia-monthly
description: Monthly snapshots of Wikipedia articles across 300+ languages
metrics:
- name: best_compression_ratio
type: compression
value: 4.557
- name: best_isotropy
type: isotropy
value: 0.8013
- name: vocabulary_size
type: vocab
value: 0
generated: 2026-01-10T00:00:00.000Z
Ladino - Wikilangs Models
Comprehensive Research Report & Full Ablation Study
This repository contains NLP models trained and evaluated by Wikilangs, specifically on Ladino Wikipedia data. We analyze tokenizers, n-gram models, Markov chains, vocabulary statistics, and word embeddings.
📋 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 | 3.622x | 3.62 | 0.1235% | 455,180 |
| 16k | 3.981x | 3.98 | 0.1357% | 414,144 |
| 32k | 4.311x | 4.31 | 0.1470% | 382,411 |
| 64k | 4.557x 🏆 | 4.56 | 0.1553% | 361,808 |
Tokenization Examples
Below are sample sentences tokenized with each vocabulary size:
Sample 1: La komarka de Pinares es una komarka de la provinsia de Soria en la junta de Kas...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | ▁la ▁komarka ▁de ▁pin ares ▁es ▁una ▁komarka ▁de ▁la ... (+20 more) |
30 |
| 16k | ▁la ▁komarka ▁de ▁pin ares ▁es ▁una ▁komarka ▁de ▁la ... (+19 more) |
29 |
| 32k | ▁la ▁komarka ▁de ▁pinares ▁es ▁una ▁komarka ▁de ▁la ▁provinsia ... (+17 more) |
27 |
| 64k | ▁la ▁komarka ▁de ▁pinares ▁es ▁una ▁komarka ▁de ▁la ▁provinsia ... (+17 more) |
27 |
Sample 2: La Wilaya de Tebesa es una wilaya arjelina. Su kapital es Tebesa. de Arjelia
| Vocab | Tokens | Count |
|---|---|---|
| 8k | ▁la ▁wilaya ▁de ▁te b esa ▁es ▁una ▁wilaya ▁arjelina ... (+10 more) |
20 |
| 16k | ▁la ▁wilaya ▁de ▁te b esa ▁es ▁una ▁wilaya ▁arjelina ... (+10 more) |
20 |
| 32k | ▁la ▁wilaya ▁de ▁te besa ▁es ▁una ▁wilaya ▁arjelina . ... (+8 more) |
18 |
| 64k | ▁la ▁wilaya ▁de ▁tebesa ▁es ▁una ▁wilaya ▁arjelina . ▁su ... (+6 more) |
16 |
Sample 3: Loeches es un belediye del Komunidad de Madrid. Ver endemas Komunidad Otonoma de...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | ▁lo e ches ▁es ▁un ▁belediye ▁del ▁komunidad ▁de ▁madrid ... (+15 more) |
25 |
| 16k | ▁lo e ches ▁es ▁un ▁belediye ▁del ▁komunidad ▁de ▁madrid ... (+15 more) |
25 |
| 32k | ▁lo eches ▁es ▁un ▁belediye ▁del ▁komunidad ▁de ▁madrid . ... (+14 more) |
24 |
| 64k | ▁lo eches ▁es ▁un ▁belediye ▁del ▁komunidad ▁de ▁madrid . ... (+14 more) |
24 |
Key Findings
- Best Compression: 64k achieves 4.557x compression
- Lowest UNK Rate: 8k with 0.1235% 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 | 4,604 | 12.17 | 16,752 | 25.6% | 52.0% |
| 2-gram | Subword | 248 🏆 | 7.96 | 3,814 | 71.5% | 98.6% |
| 3-gram | Word | 9,419 | 13.20 | 23,823 | 17.0% | 38.9% |
| 3-gram | Subword | 1,904 | 10.89 | 23,591 | 30.3% | 75.0% |
| 4-gram | Word | 17,892 | 14.13 | 39,193 | 13.5% | 30.2% |
| 4-gram | Subword | 9,391 | 13.20 | 97,361 | 15.8% | 45.6% |
| 5-gram | Word | 13,967 | 13.77 | 27,943 | 13.4% | 32.0% |
| 5-gram | Subword | 27,847 | 14.77 | 203,110 | 9.7% | 31.4% |
Top 5 N-grams by Size
2-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | de la |
8,391 |
| 2 | en la |
3,733 |
| 3 | la sivdad |
3,206 |
| 4 | de los |
3,045 |
| 5 | en el |
2,358 |
3-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | kon grafia ladina |
2,216 |
| 2 | la sivdad de |
1,675 |
| 3 | del estado de |
1,012 |
| 4 | referensias atamientos eksternos |
997 |
| 5 | grafia ladina katēggoría |
907 |
4-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | kon grafia ladina katēggoría |
907 |
| 2 | eksternos kon grafia ladina |
858 |
| 3 | atamientos eksternos kon grafia |
819 |
| 4 | es la sivdad de |
759 |
| 5 | referensias atamientos eksternos kon |
642 |
5-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | atamientos eksternos kon grafia ladina |
819 |
| 2 | referensias atamientos eksternos kon grafia |
642 |
| 3 | eksternos kon grafia ladina katēggoría |
509 |
| 4 | kapitala es la sivdad de |
449 |
| 5 | kon grafia ladina katēggoría belediyes |
303 |
2-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a _ |
136,043 |
| 2 | e _ |
108,724 |
| 3 | s _ |
99,726 |
| 4 | d e |
96,629 |
| 5 | _ e |
96,324 |
3-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | _ d e |
78,766 |
| 2 | d e _ |
60,667 |
| 3 | _ l a |
41,480 |
| 4 | e l _ |
39,777 |
| 5 | l a _ |
39,678 |
4-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | _ d e _ |
56,438 |
| 2 | _ l a _ |
31,063 |
| 3 | _ e l _ |
20,949 |
| 4 | _ e n _ |
19,353 |
| 5 | a _ d e |
16,872 |
5-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | _ d e _ l |
14,247 |
| 2 | _ d e l _ |
12,864 |
| 3 | o _ d e _ |
12,483 |
| 4 | a _ d e _ |
12,025 |
| 5 | s _ d e _ |
11,131 |
Key Findings
- Best Perplexity: 2-gram (subword) with 248
- Entropy Trend: Decreases with larger n-grams (more predictable)
- Coverage: Top-1000 patterns cover ~31% 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 | 0.7341 | 1.663 | 4.31 | 80,061 | 26.6% |
| 1 | Subword | 1.1710 | 2.252 | 8.23 | 1,285 | 0.0% |
| 2 | Word | 0.2459 | 1.186 | 1.59 | 344,604 | 75.4% |
| 2 | Subword | 0.9119 | 1.882 | 4.98 | 10,579 | 8.8% |
| 3 | Word | 0.0977 | 1.070 | 1.17 | 547,473 | 90.2% |
| 3 | Subword | 0.7442 | 1.675 | 3.49 | 52,668 | 25.6% |
| 4 | Word | 0.0388 🏆 | 1.027 | 1.06 | 640,118 | 96.1% |
| 4 | Subword | 0.5699 | 1.484 | 2.45 | 183,606 | 43.0% |
Generated Text Samples (Word-based)
Below are text samples generated from each word-based Markov chain model:
Context Size 1:
de su chika komunidad djudia 6 de 1 de un numero 1 11 de querétaro esla turkiya antika esnoga i aztekos el fin de hongos la máale antika fragua mas visitadasel grup de territorio denantes de la sigunda i afrikanos malgrado munchos se topa al sudeste
Context Size 2:
de la libertad san francisco por 51 payises dempués de la india kon grafia ladina katēggoría zionism...en la feria istoria en el 7 de ogusto de el al en ebreo כלכליסט un portmantola sivdad espanyola en meksiko referensias atamientos eksternos kon grafia ladina kon varias grafias...
Context Size 3:
kon grafia ladina katēggoría belediyes del estado de washington es uno de los 125 belediyes del esta...la sivdad de meksiko en la repuvlika popular kina kon mas de 10 000 a añosa c jeografiadel estado de veracruz kultura veracruz es una delas más pobladas dela rusia endagora egziste un enl...
Context Size 4:
kon grafia ladina katēggoría departamentos de guatemalaeksternos kon grafia ladina katēggoría istorya de kinaatamientos eksternos kon grafia ladina de madrid de madrid kon mas de 1 000 moradores kon asentamien...
Generated Text Samples (Subword-based)
Below are text samples generated from each subword-based Markov chain model:
Context Size 1:
_dejurlaya_bamoja:la_s_tiko_e_e_espe_duvdon_tun_
Context Size 2:
a_en_de_i_audishae_la_kolde_las_chs_en_ritot_oy_chi
Context Size 3:
_de_los_fraguatl_ode_–_world’s_way.__la_carle_de_se_in
Context Size 4:
_de_termistion,_gin_la_ser_for_tresénd_el_tresendiya_ay_u
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 (183,606 contexts)
- Recommendation: Context-3 or Context-4 for text generation
4. Vocabulary Analysis
Statistics
| Metric | Value |
|---|---|
| Vocabulary Size | 32,887 |
| Total Tokens | 724,627 |
| Mean Frequency | 22.03 |
| Median Frequency | 3 |
| Frequency Std Dev | 442.51 |
Most Common Words
| Rank | Word | Frequency |
|---|---|---|
| 1 | de | 56,587 |
| 2 | la | 31,911 |
| 3 | el | 21,691 |
| 4 | en | 20,558 |
| 5 | i | 17,448 |
| 6 | del | 12,991 |
| 7 | kon | 11,057 |
| 8 | es | 10,781 |
| 9 | los | 9,929 |
| 10 | ke | 7,038 |
Least Common Words (from vocabulary)
| Rank | Word | Frequency |
|---|---|---|
| 1 | radia | 2 |
| 2 | syon | 2 |
| 3 | radiasyon | 2 |
| 4 | cygnus | 2 |
| 5 | yoshlar | 2 |
| 6 | qashqadaryolik | 2 |
| 7 | ibrat | 2 |
| 8 | farzandlari | 2 |
| 9 | oʻzbekcha | 2 |
| 10 | karluka | 2 |
Zipf's Law Analysis
| Metric | Value |
|---|---|
| Zipf Coefficient | 1.0211 |
| R² (Goodness of Fit) | 0.997834 |
| Adherence Quality | excellent |
Coverage Analysis
| Top N Words | Coverage |
|---|---|
| Top 100 | 48.4% |
| Top 1,000 | 69.1% |
| Top 5,000 | 84.5% |
| Top 10,000 | 90.6% |
Key Findings
- Zipf Compliance: R²=0.9978 indicates excellent adherence to Zipf's law
- High Frequency Dominance: Top 100 words cover 48.4% of corpus
- Long Tail: 22,887 words needed for remaining 9.4% 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 | 0.8013 🏆 | 0.3223 | N/A | N/A |
| mono_64d | 64 | 0.6133 | 0.3071 | N/A | N/A |
| mono_128d | 128 | 0.1352 | 0.2792 | N/A | N/A |
| aligned_32d | 32 | 0.8013 | 0.3333 | 0.0580 | 0.2520 |
| aligned_64d | 64 | 0.6133 | 0.3150 | 0.0740 | 0.3240 |
| aligned_128d | 128 | 0.1352 | 0.2795 | 0.1260 | 0.4300 |
Key Findings
- Best Isotropy: mono_32d with 0.8013 (more uniform distribution)
- Semantic Density: Average pairwise similarity of 0.3061. Lower values indicate better semantic separation.
- Alignment Quality: Aligned models achieve up to 12.6% 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 | 0.020 | 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 |
|---|---|
-a |
ashana, afektados, asyatika |
-s |
syeklo, self, soldiers |
-m |
montalvo, mode, mediterráneo |
-k |
kuantos, kolleksioner, kuvrirse |
-t |
tradición, tersio, tributo |
-p |
plano, pearce, polrec |
-b |
beijing, burn, bordj |
-ma |
marks, malayali, martín |
Productive Suffixes
| Suffix | Examples |
|---|---|
-s |
chafarinas, viejas, afektados |
-a |
ashana, goa, estaba |
-o |
plano, montalvo, mediterráneo |
-os |
afektados, espozos, kuantos |
-n |
occupation, tradición, división |
-es |
estatales, iguales, miques |
-as |
chafarinas, viejas, venideras |
-on |
occupation, foundation, emigration |
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 |
|---|---|---|---|
ensi |
1.69x | 66 contexts | pensi, kensi, sensia |
ient |
1.69x | 46 contexts | siente, orient, viento |
ento |
1.75x | 34 contexts | lento, vento, tento |
asio |
1.67x | 40 contexts | nasio, dasio, lasio |
djud |
1.94x | 20 contexts | djudo, djudía, adjudo |
tado |
1.50x | 48 contexts | matado, metado, estado |
tern |
1.77x | 25 contexts | stern, shtern, eterna |
iona |
1.73x | 26 contexts | lisiona, adisiona, mensiona |
eren |
1.89x | 19 contexts | keren, serena, ferenc |
ntos |
1.90x | 17 contexts | santos, pontos, puntos |
graf |
1.70x | 23 contexts | grafia, grafos, grafía |
entr |
1.51x | 34 contexts | entre, entry, entró |
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 |
|---|---|---|---|
-a |
-s |
136 words | antikos, ankontrados |
-p |
-s |
131 words | pons, puerporasiones |
-a |
-o |
130 words | ameyalco, adisionado |
-a |
-a |
121 words | ailuropoda, aa |
-m |
-s |
119 words | malvinas, materials |
-k |
-s |
119 words | konsejos, kolores |
-e |
-s |
118 words | establesidas, empieses |
-k |
-a |
104 words | kaskadya, kateggoriya |
-e |
-a |
104 words | editora, esmirna |
-p |
-a |
92 words | preistorya, pionera |
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 |
|---|---|---|---|
| respublika | re-s-publika |
7.5 | publika |
| estatales | estat-al-es |
7.5 | al |
| ensinyansas | ensinyan-s-as |
7.5 | s |
| organisar | organi-s-ar |
7.5 | s |
| entenderse | entender-s-e |
7.5 | s |
| preistoria | p-re-istoria |
7.5 | istoria |
| lavoraron | lavor-ar-on |
7.5 | ar |
| valenzuela | valenzu-e-la |
7.5 | e |
| tempranas | tempr-an-as |
7.5 | an |
| espozaron | espoz-ar-on |
7.5 | ar |
| kolonialo | koloni-al-o |
7.5 | al |
| apropriado | apropri-a-do |
7.5 | a |
| parinacota | parinac-o-ta |
7.5 | o |
| universalo | univers-al-o |
7.5 | al |
| israelitas | israeli-ta-s |
7.5 | ta |
6.6 Linguistic Interpretation
Automated Insight: The language Ladino 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 (4.56x) |
| N-gram | 2-gram | Lowest perplexity (248) |
| 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) × 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.
R² (Coefficient of Determination)
Definition: Measures how well the linear fit explains the frequency-rank relationship. Ranges from 0 to 1.
Intuition: R² near 1.0 means the data closely follows Zipf's law; lower values indicate deviation from expected word frequency patterns.
What to seek: R² > 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
- 🌐 Website: wikilangs.org
- 🤗 Models: huggingface.co/wikilangs
- 📊 Data: wikipedia-monthly
- 👤 Author: Omar Kamali
- 🤝 Sponsor: Featherless AI
Generated by Wikilangs Models Pipeline
Report Date: 2026-01-10 10:17:28



















