i18n-en-fr-localization

name	i18n-en-fr-localization
description	Use when: implementing localization, browser language detection, fallback to English, and user language override via cookie.

English/French Localization

Goal

Deliver reliable multilingual behavior for English and French.

Do

• Store translatable strings in language files, not inline literals.
• Detect browser locale and map to supported locales.
• Default to English for unsupported locales.
• Provide language selector that persists preference in an essential cookie.

Checks

• Language override takes precedence over browser default.
• Missing translations degrade gracefully.
• Date, number, and message formats respect locale where applicable.