language: pwn
language_name: Paiwan
language_family: austronesian_formosan
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-austronesian_formosan
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: 4.197
- name: best_isotropy
type: isotropy
value: 0.2318
- name: vocabulary_size
type: vocab
value: 0
generated: 2026-01-10T00:00:00.000Z
Paiwan - Wikilangs Models
Comprehensive Research Report & Full Ablation Study
This repository contains NLP models trained and evaluated by Wikilangs, specifically on Paiwan 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 | 3.662x | 3.66 | 0.7466% | 241,760 |
| 16k | 3.933x | 3.94 | 0.8020% | 225,069 |
| 32k | 4.197x 🏆 | 4.20 | 0.8558% | 210,910 |
Tokenization Examples
Below are sample sentences tokenized with each vocabulary size:
Sample 1: aicu a qalici (陰莖) kinacavacavan nua uqaljai, tua sinipukelang nua naqemati tu u...
| Vocab | Tokens | Count |
|---|---|---|
| 8k | ▁aicu ▁a ▁qali ci ▁( 陰 莖 ) ▁kinacavacavan ▁nua ... (+11 more) |
21 |
| 16k | ▁aicu ▁a ▁qalici ▁( 陰 莖 ) ▁kinacavacavan ▁nua ▁uqaljai ... (+10 more) |
20 |
| 32k | ▁aicu ▁a ▁qalici ▁( 陰 莖 ) ▁kinacavacavan ▁nua ▁uqaljai ... (+8 more) |
18 |
Sample 2: kivecik(紋身) aicu a titjen a payuan kivecik a vavayan a pitalima. 排灣族來義鄉傳統手紋
| Vocab | Tokens | Count |
|---|---|---|
| 8k | ▁kivecik ( 紋 身 ) ▁aicu ▁a ▁titjen ▁a ▁payuan ... (+16 more) |
26 |
| 16k | ▁kivecik ( 紋 身 ) ▁aicu ▁a ▁titjen ▁a ▁payuan ... (+10 more) |
20 |
| 32k | ▁kivecik ( 紋身 ) ▁aicu ▁a ▁titjen ▁a ▁payuan ▁kivecik ... (+6 more) |
16 |
Sample 3: Pucevuljan(煙起的地方) avan tiribi dorama i taiwan. inalang tua tiribi na kacalisian....
| Vocab | Tokens | Count |
|---|---|---|
| 8k | ▁pucev uljan ( 煙 起 的 地方 ) ▁avan ▁tiribi ... (+26 more) |
36 |
| 16k | ▁pucevuljan ( 煙起的地方 ) ▁avan ▁tiribi ▁dorama ▁i ▁taiwan . ... (+18 more) |
28 |
| 32k | ▁pucevuljan ( 煙起的地方 ) ▁avan ▁tiribi ▁dorama ▁i ▁taiwan . ... (+17 more) |
27 |
Key Findings
- Best Compression: 32k achieves 4.197x compression
- Lowest UNK Rate: 8k with 0.7466% 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 | 1,599 | 10.64 | 3,476 | 30.6% | 70.4% |
| 2-gram | Subword | 175 🏆 | 7.45 | 2,439 | 79.5% | 98.6% |
| 3-gram | Word | 2,724 | 11.41 | 4,579 | 19.2% | 57.3% |
| 3-gram | Subword | 1,042 | 10.03 | 9,633 | 41.2% | 85.4% |
| 4-gram | Word | 4,987 | 12.28 | 7,623 | 13.9% | 41.7% |
| 4-gram | Subword | 4,257 | 12.06 | 30,586 | 22.0% | 60.0% |
| 5-gram | Word | 3,658 | 11.84 | 5,388 | 15.3% | 44.9% |
| 5-gram | Subword | 10,340 | 13.34 | 49,675 | 13.3% | 42.7% |
Top 5 N-grams by Size
2-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | aicu a |
1,188 |
| 2 | a cavilj |
821 |
| 3 | a caucau |
748 |
| 4 | a a |
732 |
| 5 | ka a |
570 |
3-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a a a |
530 |
| 2 | ka a cavilj |
413 |
| 3 | palidring a djalan |
222 |
| 4 | a djalan na |
167 |
| 5 | a palidring a |
164 |
4-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a a a a |
514 |
| 2 | a palidring a djalan |
164 |
| 3 | palidring a djalan na |
143 |
| 4 | a djalan na taiwan |
63 |
| 5 | gaku na kukumin a |
62 |
5-grams (Word):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a a a a a |
500 |
| 2 | a palidring a djalan na |
130 |
| 3 | palidring a djalan na taiwan |
62 |
| 4 | venecikan na takakudan a umaq |
41 |
| 5 | a venecikan na takakudan a |
39 |
2-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a _ |
54,084 |
| 2 | a n |
30,246 |
| 3 | _ a |
28,919 |
| 4 | n _ |
16,909 |
| 5 | k a |
16,220 |
3-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | _ a _ |
22,599 |
| 2 | a n _ |
14,379 |
| 3 | _ k a |
8,495 |
| 4 | u a _ |
8,199 |
| 5 | a _ k |
6,913 |
4-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a _ a _ |
4,611 |
| 2 | n _ a _ |
4,406 |
| 3 | a n _ a |
4,391 |
| 4 | u _ a _ |
3,968 |
| 5 | a n g a |
3,863 |
5-grams (Subword):
| Rank | N-gram | Count |
|---|---|---|
| 1 | a n _ a _ |
3,756 |
| 2 | _ t u a _ |
2,908 |
| 3 | _ a _ c a |
2,118 |
| 4 | k a t a _ |
2,100 |
| 5 | _ n u a _ |
1,928 |
Key Findings
- Best Perplexity: 2-gram (subword) with 175
- Entropy Trend: Decreases with larger n-grams (more predictable)
- Coverage: Top-1000 patterns cover ~43% 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 | 0.4964 | 1.411 | 3.23 | 22,120 | 50.4% |
| 1 | Subword | 1.2269 | 2.341 | 6.30 | 2,701 | 0.0% |
| 2 | Word | 0.2355 | 1.177 | 1.53 | 71,169 | 76.5% |
| 2 | Subword | 0.4160 | 1.334 | 2.32 | 17,020 | 58.4% |
| 3 | Word | 0.0941 | 1.067 | 1.15 | 108,439 | 90.6% |
| 3 | Subword | 0.3831 | 1.304 | 2.05 | 39,422 | 61.7% |
| 4 | Word | 0.0376 🏆 | 1.026 | 1.05 | 124,759 | 96.2% |
| 4 | Subword | 0.3237 | 1.252 | 1.72 | 80,954 | 67.6% |
Generated Text Samples (Word-based)
Below are text samples generated from each word-based Markov chain model:
Context Size 1:
a tja sini pakigaljuanga tua zusi yuli citing a cavilj a tja sicavu tua qinaljan sai marekacemecemel i vudai izua a 源氏物語 ka a puday ljaceng tua mareka caucau pukeljang atua cawtun a cavilj sigac masansika drusapuluq sa pitju a cengkung a qemungcuy maqati a tja
Context Size 2:
aicu a ika namakeljang saka aza tjaljanguanguaqan a zuga nu tjapacunan tucu tucu maljian anga zidai ...a cavilj aza cenkungaw a qinaljan a caucau nua cemual nu secevung tua amis a i tjaikacedasa caucau i guan aza na linbien 林邊 pana qapulu kemasi kuljauc pasakaledep a navalj tua taiwan
Context Size 3:
a a a a a a a a a a a a a a a a a aka a cavilj tjelu a qiljas masansivalj drusa a kuzulj sa alu taiday sa siva a cuacau 3palidring a djalan na qakaw 23px sikamasan pitjulj a palidring a djalan na taiwan paravacan a racev ...
Context Size 4:
a a a a a a a a a a a a a a a a a a aa palidring a djalan na taiwan djalan a pasaviri itua taiwan 省道 23px sikamasan 118 a palidirng a dja...palidring a djalan na taiwan patje dahu gu kata sanwan gu 省道 23px sikamasannemelj a palidring a djal...
Generated Text Samples (Subword-based)
Below are text samples generated from each subword-based Markov chain model:
Context Size 1:
alanasemekin._ke_a_kay_avavan"pangaivazua_ilâ-1,
Context Size 2:
a_liljeledasa_paian_i_nucau,_kak(區_ayalet_of_jilicu
Context Size 3:
_a_drusa_kinalj_i_an_富源森林遊樂區vuy_umin_kata_katj張孝娘(muma
Context Size 4:
a_a_qiljan_niamadjun_a_caviljan_nua_inan_a_hada_kuara_sin
Key Findings
- Best Predictability: Context-4 (word) with 96.2% predictability
- Branching Factor: Decreases with context size (more deterministic)
- Memory Trade-off: Larger contexts require more storage (80,954 contexts)
- Recommendation: Context-3 or Context-4 for text generation
4. Vocabulary Analysis
Statistics
| Metric | Value |
|---|---|
| Vocabulary Size | 7,537 |
| Total Tokens | 130,405 |
| Mean Frequency | 17.30 |
| Median Frequency | 3 |
| Frequency Std Dev | 279.99 |
Most Common Words
| Rank | Word | Frequency |
|---|---|---|
| 1 | a | 22,819 |
| 2 | i | 3,801 |
| 3 | tua | 2,914 |
| 4 | ta | 2,856 |
| 5 | na | 2,750 |
| 6 | sa | 2,550 |
| 7 | nua | 1,941 |
| 8 | kata | 1,767 |
| 9 | izua | 1,539 |
| 10 | aicu | 1,375 |
Least Common Words (from vocabulary)
| Rank | Word | Frequency |
|---|---|---|
| 1 | tuleken | 2 |
| 2 | iqecev | 2 |
| 3 | rigi | 2 |
| 4 | 新年快樂 | 2 |
| 5 | kalevay | 2 |
| 6 | ljavia | 2 |
| 7 | capelju | 2 |
| 8 | sanvaljin | 2 |
| 9 | qazavai | 2 |
| 10 | sinikamaretimalji | 2 |
Zipf's Law Analysis
| Metric | Value |
|---|---|
| Zipf Coefficient | 1.0332 |
| R² (Goodness of Fit) | 0.987155 |
| Adherence Quality | excellent |
Coverage Analysis
| Top N Words | Coverage |
|---|---|
| Top 100 | 56.8% |
| Top 1,000 | 81.7% |
| Top 5,000 | 96.1% |
| Top 10,000 | 0.0% |
Key Findings
- Zipf Compliance: R²=0.9872 indicates excellent adherence to Zipf's law
- High Frequency Dominance: Top 100 words cover 56.8% of corpus
- Long Tail: -2,463 words needed for remaining 100.0% 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 | 0.2318 | 0.4443 | N/A | N/A |
| mono_64d | 64 | 0.0360 | 0.4479 | N/A | N/A |
| mono_128d | 128 | 0.0037 | 0.4516 | N/A | N/A |
| aligned_32d | 32 | 0.2318 🏆 | 0.4503 | 0.0153 | 0.1682 |
| aligned_64d | 64 | 0.0360 | 0.4544 | 0.0612 | 0.2355 |
| aligned_128d | 128 | 0.0037 | 0.4558 | 0.0795 | 0.2630 |
Key Findings
- Best Isotropy: aligned_32d with 0.2318 (more uniform distribution)
- Semantic Density: Average pairwise similarity of 0.4507. Lower values indicate better semantic separation.
- Alignment Quality: Aligned models achieve up to 8.0% 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 | 0.051 | 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 |
|---|---|
-s |
serviciilor, sineqetj, sanparavac |
-ma |
mavananga, marekatalem, masiljid |
-pa |
pacual, paywanzuku, pakan |
-si |
sineqetj, sisupuan, sinikieces |
-ka |
kaku, kabalelradhane, katalemmang |
-t |
tjaljev, tunis, tatun |
-k |
kising, kaku, kusitik |
-ki |
kising, kipusalimaliman, kinanavun |
Productive Suffixes
| Suffix | Examples |
|---|---|
-an |
sisupuan, pusikingan, sinupuan |
-n |
amen, zunghen, sisupuan |
-a |
numatazuwa, mavananga, alja |
-ng |
kising, wearing, kicaing |
-u |
dukangpu, ninpu, kaku |
-g |
kising, wearing, kicaing |
-lj |
nasetevelj, sikamasantjelulj, cemqalj |
-j |
sineqetj, nasetevelj, sikamasantjelulj |
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 |
|---|---|---|---|
malj |
1.43x | 24 contexts | malje, malji, limalj |
alan |
1.31x | 31 contexts | alang, calan, kalan |
java |
1.40x | 18 contexts | tjava, kaljava, utjavan |
jalj |
1.37x | 18 contexts | udjalj, tjalju, tjalja |
kema |
1.41x | 16 contexts | kemac, kemai, keman |
djal |
1.41x | 16 contexts | djali, udjalj, djalin |
ljan |
1.43x | 13 contexts | aljan, iljang, ljangi |
nalj |
1.69x | 8 contexts | inaljan, naljavek, pinaljak |
tjal |
1.37x | 12 contexts | tjala, tjalju, tjalja |
ayan |
1.36x | 11 contexts | ayanga, pavayan, kavayan |
emas |
1.35x | 11 contexts | cemas, remasi, kemasi |
cavi |
1.51x | 8 contexts | cavij, cavilj, tucavilj |
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 |
|---|---|---|---|
-s |
-n |
201 words | sisupuan, sinupuan |
-s |
-an |
182 words | sisupuan, sinupuan |
-ka |
-n |
145 words | kacilisian, kaljasangasangasan |
-ka |
-an |
138 words | kacilisian, kaljasangasangasan |
-k |
-n |
127 words | kipusalimaliman, kinanavun |
-t |
-n |
126 words | tatun, tjanusun |
-k |
-an |
117 words | kipusalimaliman, kinavecikan |
-t |
-an |
108 words | taivuan, tjaisangasangasan |
-p |
-n |
89 words | pusikingan, pinuvecikan |
-p |
-an |
82 words | pusikingan, pinuvecikan |
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 |
|---|---|---|---|
| sikudjaljan | si-ku-djaljan |
7.5 | djaljan |
| sematjaljitiv | se-ma-tjaljitiv |
7.5 | tjaljitiv |
| sasipavay | sa-si-pavay |
7.5 | pavay |
| matadrusa | ma-ta-drusa |
7.5 | drusa |
| kinaqipuan | kinaqi-pu-an |
7.5 | pu |
| ljivakung | ljiva-ku-ng |
7.5 | ku |
| sikamasansimuluq | si-ka-masansimuluq |
7.5 | masansimuluq |
| djadjaljunan | djadjalju-n-an |
7.5 | n |
| rinipunan | rinipu-n-an |
7.5 | n |
| sekacedas | se-ka-cedas |
7.5 | cedas |
| blubluone | blubluo-n-e |
7.5 | n |
| philippines | philippi-n-es |
7.5 | n |
| makapalingulj | ma-ka-palingulj |
7.5 | palingulj |
| kadjunagnan | kadjunag-n-an |
7.5 | n |
| mapualang | ma-pu-alang |
7.5 | alang |
6.6 Linguistic Interpretation
Automated Insight: The language Paiwan shows high morphological productivity. The subword models are significantly more efficient than word models, suggesting a rich system of affixation or compounding.
7. Summary & Recommendations
Production Recommendations
| Component | Recommended | Rationale |
|---|---|---|
| Tokenizer | 32k BPE | Best compression (4.20x) |
| N-gram | 2-gram | Lowest perplexity (175) |
| Markov | Context-4 | Highest predictability (96.2%) |
| 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 18:13:50



















