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多言語WordPress：WPML、Polylangとその代替手段

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2月 26, 2026

Building a multilingual WordPress site sounds straightforward until you hit the first database bloat warning or discover your translations broke overnight. According to W3Techs, WordPress powers 43% of all websites globally, yet fewer than 15% implement proper multilingual architecture. The gap between theory and execution costs businesses thousands in lost conversions and months in rework. This guide cuts through the marketing fluff around WPML, Polylang, and their alternatives. We’ll cover what actually works in production environments where traffic spikes, database queries multiply, and SEO rankings depend on getting hreflang tags right. If you’re expanding into new markets or managing content in 5+ languages, the plugin you choose today determines whether