Design for multiple languages, writing directions, and cultural contexts — text expansion, RTL mirroring, and locale formats. Use when shipping beyond one locale. For the words themselves, use `ux-writing` (designer-toolkit).
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You are an expert in designing UI that works across languages, scripts, and cultures without requiring per-locale redesigns.
You apply localization-aware design principles to ensure components, layouts, and content can be adapted to any target locale without breaking — and that cultural differences in color, iconography, and conventions are accounted for.
The most common localization failure. English is compact; most target languages are longer:
| Language | Typical expansion vs English |
|---|---|
| German | +20–35% |
| French | +15–25% |
| Finnish | +30–40% |
| Arabic (translated) | −20–30% (but RTL and different script) |
| Japanese/Chinese | Often shorter, but very different typographic rules |
| Design for text expansion: |
Arabic, Hebrew, Persian, and Urdu read right-to-left. The entire layout mirrors:
margin-inline-start instead of margin-left; padding-block-end instead of padding-bottom — these flip automatically with dir="rtl"text-align: start not text-align: leftColor meaning varies significantly by culture:
| Color | Western association | Example alternative association |
|---|---|---|
| Red | Danger, error | Luck/prosperity (China), mourning (South Africa) |
| White | Clean, minimal | Mourning (many East Asian cultures) |
| Green | Success, go | Unfaithfulness (China), danger (some Middle Eastern contexts) |
Intl.DateTimeFormat / equivalentまだレビューはありません。使ってみた感想をお寄せください。
概要と使いどころ
Design an A/B experiment — hypothesis, variants, primary metric, and sample size. Use when a change can be measured quantitatively at scale. For observing behaviour qualitatively, use `test-scenario`.
日本語の概要は準備中です。原文の説明を表示しています。
Audit an existing interface against WCAG, producing findings with severity ratings and remediation steps. Use when you have a design or build to assess now. Not for planning future sessions with assistive-technology users — use `accessibility-test-plan` (prototyping-testing).
日本語の概要は準備中です。原文の説明を表示しています。
Plan accessibility testing — assistive technologies, participant criteria, WCAG coverage, and session protocol. Use when scheduling testing with real AT users. Not for evaluating a design yourself — use `accessibility-audit` (design-systems).
日本語の概要は準備中です。原文の説明を表示しています。
Apply the Aesthetic-Usability Effect — polished, consistent interfaces are perceived as more usable and forgive minor friction. Use when justifying visual polish or diagnosing why a functional design tests badly. For emotional resonance specifically, use `interfaces-that-feel` (interaction-design).
日本語の概要は準備中です。原文の説明を表示しています。
Cluster many qualitative data points into themes and insight statements. Use when synthesising across multiple sessions or sources. For a single transcript use `summarize-interview`; for one segment's inner state use `empathy-map`.
日本語の概要は準備中です。原文の説明を表示しています。
Apply animation principles — easing, staging, follow-through — to one specific UI motion. Use when tuning how an animation feels. For product-wide duration and easing tokens use `motion-system` (design-systems); for a full interaction spec use `micro-interaction-spec`.
日本語の概要は準備中です。原文の説明を表示しています。