i18n & RTL Audit
Check whether your UI survives translation. No signup required.
Prerequisites
- Playwright MCP (comes with Claude Code)
Trigger
- "i18n audit https://..."
- "Will my layout break when translated?"
- "Check RTL support on my site"
Workflow
- Navigate to the URL using
mcp__playwright__browser_navigate. - Document attributes — check
<html lang>anddirwithbrowser_evaluate. Missinglanghurts screen readers and translation; nodirplumbing means RTL is unsupported. - Pseudo-localization (long-string stress) — expand visible text ~40% (the typical English→German/Finnish growth) and look for overflow/clipping:
() => {
// Expand text nodes to simulate a longer language
const before = document.documentElement.scrollWidth;
document.querySelectorAll('button, a, label, h1, h2, h3, .btn, [class*=nav]').forEach(el => {
if (el.children.length === 0 && el.textContent.trim())
el.textContent = el.textContent + ' ' + el.textContent.slice(0, Math.ceil(el.textContent.length*0.4));
});
const overflow = [...document.querySelectorAll('*')]
.filter(el => el.scrollWidth > el.clientWidth + 2 && el.clientWidth > 0)
.slice(0, 20)
.map(el => el.tagName.toLowerCase() + (el.className ? '.'+String(el.className).split(' ')[0] : ''));
return { grewPage: document.documentElement.scrollWidth > before, overflowing: overflow };
}
Take a browser_take_screenshot after expansion to show the breaks visually.
- RTL — flip direction and screenshot to spot un-mirrored layouts:
() => { document.documentElement.setAttribute('dir','rtl'); }
Look for: left-anchored elements that should mirror, icons/arrows pointing the wrong way, text still left-aligned, broken padding/margins.
Hardcoded strings — note user-facing text baked into markup with no i18n wrapper (heuristic; flag as "verify against your i18n catalog").
Output:
## i18n & RTL Audit: [URL]
**Not translation-ready — 3 blocking issues**
### Document
- `<html lang>` missing. Add `lang="en"`.
- No `dir` handling — RTL languages unsupported.
### Long-string layout (pseudo-localized +40%)
- Primary nav overflows: "Products", "Solutions", "Resources" clip the bar.
- Submit button text truncates with ellipsis.
→ Use flexible widths / wrapping, not fixed px.
### RTL (dir=rtl)
- Sidebar stays on the left; should mirror to the right.
- Back-arrow icon not mirrored.
- Body text stays left-aligned.
### Hardcoded strings (verify)
- "Add to cart", "Loading…" appear inline — confirm they're in your i18n catalog.
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