i18n

A set of rules for keeping user-visible text in translation files or shared constants instead of placing it directly in interface code. It supports multiple languages through the project’s chosen translation tools.

In plain words
What is it for?
Use it when adding labels, messages, button text, accessibility text, dates, numbers, language switching, or other displayed copy.
Why use it?
It makes text easier to translate, update, reuse, and keep consistent across the application.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/ddebixx/frontend-template/i18n
Clone the repo
git clone --depth 1 https://github.com/ddebixx/frontend-template

Made for: Cursor.

Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 276 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00276
Opus 5 $0.00000 $0.00138
Sonnet 5 $0.00000 $0.00055
Haiku 4.5 $0.00000 $0.00028

Measured 2d ago against content hash c3324116785f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

i18n scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor/rules/i18n.mdc · 30 lines

What it actually says

Copy & internationalization

No inline static display strings

Do not put user-visible (or a11y) string literals in components, pages, or features.

Move copy to either:

  1. Locale catalogssrc/messages/*.json via t / getTranslations (multi-locale)
  2. Constants*.constants.ts or src/constants/ (keeps UI files clear)

The project chooses catalogs, constants, or a mix. Prefer catalogs when locales matter. Document a team default in the README if needed.

OK as literals: class names, URLs, analytics ids, enums, test fixtures.

Stack (templates)

  • Next.js → next-intl (src/i18n/request.ts + setLocale cookie)
  • Vite → i18next + react-i18next (src/i18n/setup.ts)
  • Shared switcher: components/shared/LocaleSwitcher
  • Stable keys; Intl/library for dates, numbers, plurals; set document lang

Details: docs/frontend/tools/I18N.md

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 30 lines · 0 tokens per session scan A c3324116785f

Subscribe to this mod's changes

i18n is a cursor rule published in the GitHub repository ddebixx/frontend-template (3 stars, last pushed 25d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 276 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.