localisation

localisation is a skill for Claude Code from vmobifystudio/app-dev-team. It costs 74 tokens per session (578 once invoked), scanned A, original, MIT.

A set of rules for building software that works correctly across languages and regions, including translated text, dates, numbers, currencies, and layouts.

In plain words
What is it for?
It helps teams organise translated strings, handle plural forms, format regional values, compare text correctly, and allow for longer translations in the interface.
Why use it?
It prevents hard-to-fix localisation problems caused by embedding text directly in code or assuming every language follows English rules.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the app-dev-team plugin — 32 skills, 27 commands, 30 agents, 2 hooks shipped together

Good fit It helps teams organise translated strings, handle plural forms, format regional values, compare text correctly, and allow for longer translations in the interface.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/vmobifystudio/app-dev-team/localisation
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.

Any agent
npx skills add vmobifystudio/app-dev-team --skill localisation
Clone the repo
git clone --depth 1 https://github.com/vmobifystudio/app-dev-team

Made for: Claude Code.

Or install app-dev-team, the plugin that ships this one along with the rest of its 32 skills, 27 commands, 30 agents, 2 hooks.

Wrote 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.

agentmods badge for localisation

README.md
[![agentmods](https://agentmods.dev/badge/skills/vmobifystudio/app-dev-team/localisation/github.svg)](https://agentmods.dev/skills/vmobifystudio/app-dev-team/localisation)
Your own site
<a href="https://agentmods.dev/skills/vmobifystudio/app-dev-team/localisation"><img src="https://agentmods.dev/badge/skills/vmobifystudio/app-dev-team/localisation/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.

agentmods 80×15 button for localisation

Your own site · 80×15
<a href="https://agentmods.dev/skills/vmobifystudio/app-dev-team/localisation"><img src="https://agentmods.dev/badge/skills/vmobifystudio/app-dev-team/localisation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 74 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 578 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00074 $0.00578
Opus 5.5 $0.00030 $0.00231
Sonnet 5.5 $0.00015 $0.00116
Haiku 4.5 $0.00007 $0.00058

Measured 1mo ago against content hash 1837077323c3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

localisation 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 1mo 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.

skills/localisation/SKILL.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Localisation

Localisation is an architecture decision taken at the first string, and a translation task only at the end. Teams that reverse the order pay for it twice.

Where a platform skill exists, use it: axiom-localization on Apple platforms. External and optional — missing → follow this file, never file its absence as a defect.

Do this from the first ticket, in every locale count including one

  • Every user-visible string is a key in the catalogue. No string literal in a view, ever. This is cheap now and a full re-read of the codebase later.
  • Never concatenate a sentence from fragments. Word order differs by language. Use one parameterised string per sentence.
  • Plurals use the platform's plural rules, not if count == 1. Several languages have more than two plural forms and 1 items is the cheapest possible way to look unfinished.
  • Dates, times, numbers, currencies and units go through the locale-aware formatter. A hand-formatted date is wrong in most of the world, silently.
  • Never sort or compare user-facing text with byte comparison. Use the locale-aware collator.

Layout

  • Assume text grows 30–40% from English. A button that fits exactly is a button that clips.
  • RTL is a layout mode, not a translation. Use leading/trailing, never left/right; mirror directional icons (back, next, progress) and never mirror ones with real-world orientation (a clock, a logo, a play button).
  • Test at the longest supported locale and the largest Dynamic Type together — that combination is where clipping actually happens.

Region is not language

Region determines: currency and price tier, legal and privacy obligation (privacy-reviewer), store metadata and rating, available payment methods, and sometimes whether a feature may ship at all. A locale added to the catalogue is a market entered. Say so explicitly rather than letting a translation file imply it.

Output

The locale set and its consequences are stated in docs/12-flows.md (navigation and layout impact) and in docs/15-aso.md (store metadata per locale). Pseudo-localise before you have translations — it finds hardcoded strings and clipping without waiting for a translator.

Read the full file on GitHub · 47 lines

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. 1mo ago First seen · 47 lines · 74 tokens per session scan A 1837077323c3

Subscribe to this mod's changes

localisation is a skill published in the GitHub repository vmobifystudio/app-dev-team (5 stars, last pushed 12d ago), licensed MIT. It adds 74 tokens to every session and 578 once invoked, about $0.0003 per session on Opus 5.5. 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.

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