I want advanced i18n features on the web platform

Building truly internationalized web applications is still surprisingly difficult. The existing Intl API covers the basics — number formatting, date/time formatting, and collation — but there are many gaps that force developers to rely on large third-party libraries just to handle everyday i18n scenarios.

I want the web platform to offer richer, more complete internationalization support, including:

• Locale-sensitive text segmentation: Better support for word and sentence boundaries across scripts (e.g. CJK languages, Thai), beyond what Intl.Segmenter currently provides.
• Advanced number and unit formatting: Including support for local numbering systems, currency display names in the user's language, and measurement unit conversion.
• Relative time formatting improvements: More granular control over how relative times are displayed across cultures (e.g. "just now", "yesterday", "3 weeks ago").
• Locale-aware sorting and searching: Consistent, built-in support for culturally correct string comparison without needing third-party collation tables.
• Bidirectional (BiDi) text utilities: Native JavaScript APIs for isolating and managing BiDi text, complementing CSS unicode-bidi but exposed to script so developers can handle mixed-direction strings programmatically.

These improvements would let developers deliver correctly localised experiences to global users without bundling megabytes of polyfill libraries.