Transer 多言語ページ翻訳

Transer 多言語ページ翻訳 connects your WordPress site to the transer.io server-side translation API. It is designed specifically for sites whose original content is written in Japanese.

Why a Japanese-first engine matters

General-purpose translation tools treat Japanese as one language among many. Japanese source text has structural habits that break those tools, and the engine behind this plugin is built around them:

• Japanese-era dates: Reiwa, Heisei and Showa dates are resolved to the correct Gregorian year rather than being transliterated or dropped.
• Kana-heavy sentences: Text written largely in hiragana is ambiguous to morphological analysis. The engine disambiguates word boundaries instead of guessing at them.
• Decorative markup: Japanese sites often split words across <span> tags for styling. The engine reads through that markup so a single word is not translated as several fragments.

The full HTML of the page is sent as-is, so context is preserved across the whole document rather than being lost sentence by sentence. The translated page is then rendered server-side, and multilingual SEO tags such as hreflang and canonical are generated automatically.

Key features

• Server-side translation: The page is translated before it reaches the browser, so search engines and visitors receive the same finished HTML.
• Automatic multilingual SEO tags: canonical and hreflang tags are inserted automatically for every contracted language.
• Automatic language-switcher UI: No shortcode placement required. The language switcher is automatically shown on both the original and translated pages.
• Multilingual sitemap: Visiting /transer-sitemap.xml dynamically generates a sitemap with per-language hreflang annotations.
• No server configuration required: No .htaccess rewriting or web-server rewrite rules are needed. The plugin detects language-prefixed URLs (e.g. /en/about) during WordPress’s init hook.

A transer.io account and API key are required

Using this plugin requires a free account and API key from transer.io. The first language is free of charge.

External services

This plugin connects to transer.io, a third-party server-side translation API operated by Hippotech USA Inc. (the same company that develops this plugin), in order to translate your page content into the languages you configure.

• What is sent, and when: When a visitor requests a page in a language other than your site’s original language, the plugin captures the full HTML output of that page (via an output buffer) and sends it, together with the requesting hostname, URL path, source language code, and your configured list of contracted languages, to the transer.io translation endpoint ({configured base_url, default https://api.transer.io}/translate-page). No request is sent when a page is viewed in the original language.
• Authentication: Requests are authenticated using an API key that you obtain yourself from your transer.io account and enter on the plugin’s settings screen. No API key is hard-coded in the plugin.
• On request failure: If the request to transer.io fails for any reason, the plugin falls back to displaying the original, untranslated page; it never blocks page rendering.
• Data disclosure: The HTML sent to transer.io reflects the page as rendered by WordPress; it does not include values a visitor may have entered into forms on the page.

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