pub fn initialize_language(
force_lang: Option<&str>,
config_dir_override: Option<&Path>,
) -> Result<()>Expand description
Initializes i18n by resolving locale (5-layer precedence) and publishing
once to the global crate::locale OnceLock.
force_lang is the CLI --lang value (already clap-validated when present).
config_dir_override is --config-dir for persisted preference lookup.