Multilingual Architecture for Trade Sites: hreflang vs. Sepa

Subdirectory or subdomain? Where should x-default point? This piece covers the most common production mistakes and the correct setup.

This article is an excerpt from the ECGEO System knowledge base. Core takeaway: for a foreign-trade site to become a citeable first source for AI, the precondition is structuring real business facts (specs, certifications, delivery, compliance) as machine-readable content, and declaring authority to AI via llms.txt and structured data.

We hold to three principles — facts first, discoverability by default, compliance red line — and do not guarantee rankings, citations or conversions. See Solutions and Capabilities.

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