locale-format-validator

Overview

Locale-specific formatting is a common bug source:

• US user sees 5/4/2026 and reads "May 4." Spanish user sees the same string and reads "April 5."
• German user sees 1,234.56 and may interpret as 1.23456 (the comma is a thousands separator, the period a decimal in DE).
• Japanese user sees a price in dollars instead of yen.

This skill verifies the app uses the right format per locale.

When to use

• The product displays dates, numbers, currencies, or times.
• A bug report says "the date is in the wrong format."
• Pre-release: scheduled locale-format check.