internationalization

name	internationalization
description	Important skill covering Unicode (UTF-8, UTF-16), ICU4C library, locale handling, collation, number/date formatting, and i18n APIs for ETS stdlib. Use this skill when: (1) Implementing i18n features, (2) Using ICU library, (3) Formatting for locales, (4) Handling Unicode text, (5) Supporting RTL languages, or (6) Designing locale-aware APIs.

Internationalization

Quick Start

Locale-aware formatting:

// Format number with locale
formatNumber(1234.56, "en_US");  // "1,234.56"
formatNumber(1234.56, "de_DE");  // "1.234,56"

ICU integration:

// C++ side with ICU
auto formatter = icu::NumberFormat::createInstance(locale);
formatter->format(number, result);

Unicode handling:

• UTF-8, UTF-16 encodings
• Code points vs graphemes
• Normalization (NFC, NFD)

Key Concepts

Unicode:

• Code points: Unique numbers
• Graphemes: User-perceived characters
• Surrogate pairs: Emoji, > 0xFFFF

ICU Library:

• Locale handling
• Number/currency formatting
• Date/time formatting
• Collation (sorting)