Localize Routes

Localize Routes

Overview

Use this skill for changes that affect locale prefixes, translation dictionaries, or Gatsby i18n routing behavior. This repo uses gatsby-plugin-react-i18next with manual matchPath rules and language-aware page structures, so routing changes usually touch more than one file.

Workflow

1) Identify the scope of the i18n change

Typical triggers:

• New translation keys in UI
• New or renamed top-level route prefixes
• Locale-specific availability differences
• Language-dependent banner, navigation, or SEO behavior

2) Review the Gatsby i18n entrypoint

Inspect gatsby-config.js, especially:

• languages
• defaultLanguage
• redirect
• pages[].matchPath
• getLanguageFromPath

In this repo, route families under docs prefixes are explicitly listed in matchPath. New top-level prefixes often require updates there.

3) Update translation files when UI text changes

Edit:

• locale/en/translation.json
• locale/zh/translation.json
• locale/ja/translation.json

Rules:

• Keep keys consistent across locales
• Only add the languages actually supported by the feature
• Reuse existing namespaces and key naming conventions when possible

4) Review routing helpers and consumers

Depending on the task, also inspect:

• gatsby/create-pages/*
• src/templates/*
• src/components/Layout/Header/LangSwitch.tsx
• components using useI18next, Trans, or locale-aware branching

Be especially careful when changing:

• omission of /en/
• route prefixes like developer, best-practices, api, ai, releases
• locale availability shown in UI via availIn.locale

5) Validate

At minimum:

• Confirm matchPath covers the affected route family
• Confirm new translation keys exist in all intended locale files
• Confirm any locale-conditional UI logic still behaves correctly
• Run yarn build when feasible

Output Checklist

Report:

• Which locale and routing files changed
• Whether gatsby-config.js matchPath was reviewed or changed
• Which translation keys were added or updated
• Any language-specific limitations
• Whether yarn build was run