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.
npx skills add aj-geddes/useful-ai-prompts --skill internationalization-i18ngit clone --depth 1 https://github.com/aj-geddes/useful-ai-promptsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/internationalization-i18n)<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/internationalization-i18n"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/internationalization-i18n/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/aj-geddes/useful-ai-prompts/internationalization-i18n"><img src="https://agentmods.dev/badge/skills/aj-geddes/useful-ai-prompts/internationalization-i18n.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00060 | $0.00922 |
| Opus 5 | $0.00030 | $0.00461 |
| Sonnet 5 | $0.00012 | $0.00184 |
| Haiku 4.5 | $0.00006 | $0.00092 |
Grade A, and why
internationalization-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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Internationalization (i18n) & Localization
Table of Contents
Overview
Comprehensive guide to implementing internationalization and localization in applications. Covers message translation, pluralization, date/time/number formatting, RTL languages, and integration with popular i18n libraries.
When to Use
- Building multi-language applications
- Supporting international users
- Implementing language switching
- Formatting dates, times, and numbers for different locales
- Supporting RTL (right-to-left) languages
- Extracting and managing translation strings
- Implementing pluralization rules
- Setting up translation workflows
Quick Start
Minimal working example:
// i18n.ts
import i18next from "i18next";
import Backend from "i18next-http-backend";
import LanguageDetector from "i18next-browser-languagedetector";
await i18next
.use(Backend)
.use(LanguageDetector)
.init({
fallbackLng: "en",
debug: process.env.NODE_ENV === "development",
interpolation: {
escapeValue: false, // React already escapes
},
backend: {
loadPath: "/locales/{{lng}}/{{ns}}.json",
},
detection: {
order: ["querystring", "cookie", "localStorage", "navigator"],
caches: ["localStorage", "cookie"],
},
});
// ... (see reference guides for full implementation)
Reference Guides
Detailed implementations in the references/ directory:
| Guide | Contents |
|---|---|
| i18next (JavaScript/TypeScript) | i18next (JavaScript/TypeScript) |
| React-Intl (Format.js) | React-Intl (Format.js) |
| Python i18n (gettext) | Python i18n (gettext) |
| Date and Time Formatting | Date and Time Formatting |
| Number and Currency Formatting | Number and Currency Formatting |
| Pluralization Rules | Pluralization Rules |
| RTL (Right-to-Left) Language Support | RTL (Right-to-Left) Language Support |
| Translation Management | Translation Management |
| Locale Detection | Locale Detection |
| Server-Side i18n | Server-Side i18n |
What ships with it
11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/date-and-time-formatting.md 2.2 KB
- references/i18next-javascripttypescript.md 3.6 KB
- references/locale-detection.md 1.1 KB
- references/number-and-currency-formatting.md 1.5 KB
- references/pluralization-rules.md 1.6 KB
- references/python-i18n-gettext.md 1.7 KB
- references/react-intl-formatjs.md 1.3 KB
- references/rtl-right-to-left-language-support.md 1.6 KB
- references/server-side-i18n.md 746 B
- references/translation-management.md 1.9 KB
- templates/component-template.tsx 318 B
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.
- 9d ago First seen · 116 lines · 60 tokens per session scan A a17d7fbfca9e
internationalization-i18n is a skill published in the GitHub repository aj-geddes/useful-ai-prompts (338 stars, last pushed 6mo ago), licensed MIT. It adds 60 tokens to every session and 922 once invoked, about $0.0003 per session on Opus 5. 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 2026-09-03.
Other skills, from other repositories
chinese-documentation
A Chinese technical-documentation style guide covering spacing, punctuation, numbers, terminology, and links when Chinese and English appear together.
azure-ai-translation-text-py
Azure AI Text Translation SDK for real-time text translation, transliteration, language detection, and dictionary lookup. Use for translating text content in applications. Triggers: "text translation", "translator", "translate text", "transliterate", "TextTranslationClient".
harden
Improve interface resilience through better error handling, i18n support, text overflow handling, and edge case management. Makes interfaces robust and production-ready. Use when the user asks to harden, make production-ready, handle edge cases, add error states, or fix overflow and i18n issues.
seedance-vocab-ja
This skill should be used when the user asks for Japanese Seedance 2.0 prompt wording, Japanese cinematic vocabulary, or translation of camera, lighting, action, VFX, audio, and production terms into Japanese.
asc-subscription-localization
Bulk-localize subscription, subscription-group, and in-app purchase display names across App Store locales using asc, including API 4.4.1 version-scoped v2 resources. Use when filling or updating subscription/IAP names and descriptions without App Store Connect UI work.
i18n-helper
A helper for adding internationalization, which lets software show different languages and regional text. It finds user-visible text written directly in code and moves it into language files.