.lproj

Localization project directory grouping language-specific resources for macOS and iOS applications

Handled by macOS itself

Format facts

MIME type: application/x-lproj
Apple UTI: custom
Stock Quick Look: macOS renders a preview
Planned approach (census): native-sufficient
Icon hint: generic-icon
Prevalence: universal

Renderer note (from the census)

Finder previews localization folders natively

Gotchas: macOS/iOS localization