AI Translation & Localization
AI Translation Testing Methodology
How we evaluate machine translation, localization, and multilingual content tools.
← Back to Methodology HubThe 100-Point Scoring Framework
We test translation tools with standardized texts in 20 language pairs, measuring accuracy with professional translator reviews and BLEU scores.
Translation Quality
35 pts
Pricing
25 pts
Features
20 pts
Platform & UX
20 pts
Our Testing Process
01
Translation Tests
Standardized texts in 20 language pairs.
02
Expert Review
Professional translators rate accuracy and fluency.
03
Feature Audit
Test glossaries, TM, and localization workflows.
04
Scoring
BLEU scores and expert ratings published.
1. Translation Quality
35 points max
Accuracy, fluency, and language coverage.
8
Accuracy (BLEU Score)
Machine translation quality benchmarked with BLEU.
7
Fluency
Natural-sounding output rated by native speakers.
6
Language Pairs
Number of supported languages (100+ scores highest).
5
Context Awareness
Handling of context, idioms, and domain terminology.
5
Document Translation
PDF, DOCX, and formatted document translation quality.
4
Specialized Domains
Legal, medical, technical translation accuracy.
2. Pricing
25 points max
Cost per word and volume pricing.
7
Free Tier
Free characters/words per month.
6
Cost per Word
Price per 1,000 words on paid plans.
5
API Pricing
Developer API pricing per million characters.
4
Volume Discounts
Enterprise and high-volume pricing.
3
Team Plans
Multi-user access with glossary sharing.
3. Features
20 points max
Advanced translation and localization features.
5
Glossary / TM
Custom glossaries and translation memory.
4
Website Translation
Full website translation and localization.
4
Tone / Formality
Formal/informal toggle and tone control.
4
File Formats
Support for XLIFF, JSON, PO, and CMS formats.
3
Real-Time Translation
Live translation for chat and communication.
4. Platform & Integration
20 points max
API, integrations, and collaboration.
5
API Quality
REST API documentation and SDK support.
4
CMS Integration
WordPress, Shopify, and headless CMS plugins.
4
CAT Tool Integration
memoQ, Trados, and CAT tool compatibility.
4
Collaboration
Team workflows, review, and approval processes.
3
Web & Mobile
Browser extension and mobile app quality.
Score Grading Scale
| Score Range | Grade | Interpretation |
|---|---|---|
| 85 – 100 | Excellent | Best-in-class. Industry leader in this category. |
| 70 – 84 | Good | Strong performer for most use cases, minor gaps. |
| 55 – 69 | Satisfactory | Acceptable but falls behind leaders. Consider alternatives. |
| 0 – 54 | Needs Improvement | Significant limitations. Compare alternatives carefully. |
Independence & Transparency
Expert-reviewed: Professional translators evaluate all outputs.
No sponsored rankings: Scores are independent.
Bi-annual updates: Re-tested when major model updates ship.
Last methodology update: March 2026