# Multi-language content selector

Detects user language preference and routes to localized content variant, headers, and UI based on browser locale.

Grade: X — Not a typed-decision job: needs written output, plain rules or lookups would do it, or needs raw image or audio. Also marks ideas that must not be built.. Score: 4.97.

Vertical: Cross-industry.

Function: Personalization & CRO.

Status: Seen in the wild.

Volume: high.

Value: meaningful.

Risk: moderate.

Evidence: described plan.

Flags: check-fit.

- [Source](https://doc.customfit.ai/audience-segments/utm-parameters)
- [Vertical](/verticals/cross_industry/)
- [Function](/functions/personalization_cro/)
- [Visitor-aware homepage hero assembly](/use-cases/visitor-aware-homepage-hero-assembly/)
- [Next-best-action recommendation](/use-cases/next-best-action-recommendation/)
- [Which pricing-page variant fits this visitor](/use-cases/which-pricing-page-variant-fits-this-visitor/)
- [Content recommendations by user profile](/use-cases/content-recommendations-by-user-profile/)
- [Dynamic content variant selection](/use-cases/dynamic-content-variant-selection/)
- [Vercel Edge personalization decision](/use-cases/vercel-edge-personalization-decision/)