pub fn install(default: &str, locales: &[(&str, &str)])Expand description
Register the app’s locales (see day_localization::install) and fix the layout direction from the
locale that actually resolved (docs/localization): an RTL locale (Arabic, Hebrew, …) mirrors
every horizontal placement and flips the native toolkit’s direction. Direction is resolved
once, before the first layout; runtime set_locale switches strings but not direction.