Obnoxious that I can't just push this directly to the mac and test for some reason...

Cargo.toml

@@ -26,7 +26,7 @@ serde = { version = "1", optional = true, features = ["derive"] }
 thiserror = "1"
 
 [dev-dependencies]
-env_logger = "0.9"
+env_logger = "0.10"
 
 [target.'cfg(windows)'.dependencies]
 tolk = { version = "0.5", optional = true }

src/backends/av_foundation.rs

@@ -1,5 +1,5 @@
 #[cfg(any(target_os = "macos", target_os = "ios"))]
-use std::{str::FromStr, sync::Mutex};
+use std::sync::Mutex;
 
 use cocoa_foundation::base::{id, nil, NO};
 use cocoa_foundation::foundation::NSString;
@@ -10,7 +10,7 @@ use lazy_static::lazy_static;
 use log::{info, trace};
 use objc::runtime::{Object, Sel};
 use objc::{class, declare::ClassDecl, msg_send, sel, sel_impl};
-use unic_langid::LanguageIdentifier;
+use oxilangtag::LanguageTag;
 
 use crate::{Backend, BackendId, Error, Features, Gender, UtteranceId, Voice, CALLBACKS};
 
@@ -312,7 +312,7 @@ impl Backend for AvFoundation {
                     CFString::wrap_under_get_rule(msg_send![*v as *const Object, language])
                 };
                 let language = language.to_string();
-                let language = LanguageIdentifier::from_str(&language).unwrap();
+                let language = LanguageTag::from_str(&language).unwrap();
                 Voice {
                     id: id.to_string(),
                     name: name.to_string(),