name	translation-quality
description	Japanese to English translation quality evaluation using xCOMET

Translation Quality Evaluation Skill

Purpose

Evaluate and ensure high-quality Japanese → English translations using automated quality metrics (xCOMET) with clear decision criteria and actionable outputs.

Why This Skill?

Manual translation review is time-consuming and subjective
xCOMET provides objective, reproducible quality scores
Clear thresholds enable automated decision-making
Results can be directly embedded into documentation

Inputs

Input	Type	Description
source_file	`.ja.md` file	Japanese source document
translation_file	`.md` file	English translation document
threshold	number (0-1)	Minimum acceptable score (default: 0.85)

Outputs

Output	Type	Description
quality_report	Markdown	Embeddable report with scores and recommendations
segment_details	Table	Per-segment scores and issues
action_items	List	Specific corrections needed

Constraints

MUST

Use xcomet:xcomet_batch_evaluate for multi-segment evaluation
Set source_lang: "ja" and target_lang: "en"
Generate report in embeddable Markdown format
Include both summary and detailed segment scores

SHOULD

Evaluate at least 10 representative segments per document
Include segment text in reports for segments scoring < 0.90
Use deepl:translate-text for re-translation when --fix is specified

MUST NOT

Mark documents as "Excellent" if any segment scores < 0.85
Skip segments containing only code blocks
Include raw JSON in final report (format as Markdown tables)

Workflow

Step 1: File Detection

Detect .ja.md ↔ .md pairs in the specified path
- If single file specified, find its pair automatically
- If directory specified, find all pairs recursively

Step 2: Segment Extraction

Extract translatable segments from both files:
1. Document title (# heading)
2. Section headings (## / ### headings)
3. Key paragraphs (first 2-3 sentences per section)
4. Table content
5. List items with substantive content

Skip:
- Code blocks (```)
- URLs and links
- Mermaid diagrams
- Pure formatting elements

Step 3: Quality Evaluation

Call xCOMET MCP with extracted pairs:

mcp: xcomet
tool: xcomet_batch_evaluate
params:
  pairs: [{ source: "日本語", translation: "English" }, ...]
  source_lang: "ja"
  target_lang: "en"
  response_format: "markdown"

Step 4: Result Classification

Apply decision criteria to scores and generate report.

Step 5: Report Generation

Output embeddable Markdown with:

Summary table
Quality criteria reference
Segment details (for scores < 0.95)
Recommendations

Decision Criteria

Condition	Action	Rationale
Average ≥ 0.95	✅ Excellent - Publish	Professional quality
0.90 ≤ Average < 0.95	✅ Good - Minor review	May benefit from polish
0.85 ≤ Average < 0.90	⚠️ Review required	Check flagged segments
0.70 ≤ Average < 0.85	🔄 Re-translate	Parameter adjustment needed
Average < 0.70	❌ Manual revision	Significant issues present

Per-Segment Criteria

Score	Label	Action
≥ 0.95	Excellent	No action needed
0.90-0.94	Good	Review if time permits
0.85-0.89	Acceptable	Consider revision
< 0.85	Problematic	Must revise

Examples

Example 1: Single File Evaluation

Input:

/check-translation docs/skills/overview.md

Process:

Detect pair: overview.ja.md ↔ overview.md
Extract 15 segments
Call xcomet:xcomet_batch_evaluate
Average score: 0.978
Generate report

Output:

## Translation Quality Report

### Summary

| Metric | Value |
|--------|-------|
| Files checked | 1 |
| Segments evaluated | 15 |
| Average score | **0.978** |
| Status | ✅ Excellent |

### Quality Criteria

| Score | Rating | Action |
|-------|--------|--------|
| ≥ 0.95 | Excellent | Publish |
| 0.90-0.94 | Good | Minor review |
| 0.85-0.89 | Acceptable | Review |
| < 0.85 | Problematic | Revise |

### Segment Details

All 15 segments scored ≥ 0.95. No issues detected.

### Recommendation

✅ Ready for publication without changes.

Example 2: Directory Batch Evaluation

Input:

/check-translation docs/

Process:

Find 8 file pairs in docs/
Extract 40 total segments
Batch evaluate all segments
Generate comprehensive report

Output:

## Translation Quality Report

### Summary

| Metric | Value |
|--------|-------|
| Files checked | 8 |
| Segments evaluated | 40 |
| Average score | **0.972** |
| Status | ✅ Excellent |
| Critical errors | 0 |

### Per-File Results

| File | Score | Status |
|------|-------|--------|
| README.md | 0.975 | ✅ Excellent |
| concepts/01-vision.md | 0.978 | ✅ Excellent |
| skills/anti-patterns.md | 0.957 | ✅ Excellent |
| workflows/patterns.md | 0.977 | ✅ Excellent |

### Segments Needing Attention (< 0.95)

| Source | Translation | Score |
|--------|-------------|-------|
| MCPサーバーの開発・運用... | Organizing security risks... | 0.898 |

### Recommendation

✅ Overall excellent quality. Optional: Review 1 segment above.

Anti-Patterns

Pattern: Raw Score Reporting

Problematic Approach:

Score: 0.9750812888145447

Why It's Problematic: Overly precise numbers suggest false accuracy

Correct Approach:

Score: **0.975** (Excellent)

Pattern: Missing Context

Problematic Approach:

3 segments below threshold

Why It's Problematic: Reviewer cannot act without seeing the text

Correct Approach:

| Source | Translation | Score |
|--------|-------------|-------|
| 実際のテキスト | Actual text | 0.84 |

Related MCPs

MCP	Usage	Required
xcomet-mcp-server	xcomet_batch_evaluate, xcomet_evaluate	Required
deepl-mcp	translate-text (for --fix option)	Optional

References

name	translation-quality
description	Japanese to English translation quality evaluation using xCOMET