TL;DR
For international sites: Use ExperimentHQ with geo-targeting and hreflang-safe implementation. Test per-region (not all markets at once), use canonical URLs properly, and test cultural differences (not just translations). Avoid creating duplicate URLs that confuse search engines.
International Testing Challenges
Hreflang conflicts
Solution: Use canonical URLs, avoid creating duplicate pages
Different traffic volumes per region
Solution: Run separate tests per high-traffic region
Cultural differences in conversion
Solution: Test different hypotheses per market
Currency and pricing display
Solution: Test pricing presentation, not just translation
Tool Comparison
| Tool | Geo-Targeting | Multi-Language | Hreflang Safe | Verdict |
|---|---|---|---|---|
| ExperimentHQ | Best Overall | |||
| VWO | Enterprise | |||
| Optimizely | Enterprise only |
SEO Considerations for International Testing
- • Use canonical URLs: Point variants to original page
- • Don't break hreflang: Keep language/region signals consistent
- • Avoid duplicate content: Don't create separate URLs per variant
- • Test per-region: US traffic separate from UK, DE, etc.
Our Recommendation
For international sites: ExperimentHQ with geo-targeting. Test major markets separately, respect hreflang, and use proper canonicals.