How to reproduce:

1. Open the attached "IN-146535" project
2. In the top menu bar set (Edit > Project Settings… > Player > Windows, Mac, Linux settings > Resolution and Presentation > Resolution > Fullscreen Mode) to "Windowed"
3. Open the Build Settings window
4. Tick "Create Xcode Project" checkbox
5. Build for macOS
6. Open the built {{.xcodeproj}} in Xcode
7. In Xcode set (Product > Scheme > Edit Scheme… > Run > Options > App Language) to "Japanese"
8. Build and run the app from Xcode
9. Observe the window title and the Mac top menu bar app title of the built app

Actual result: Window title is in English and the Mac top menu bar app title is in Japanese
Expected result: Window title is in Japanese and the Mac top menu bar app title is in Japanese

Reproducible with: 1.5.12 (6000.7.0a1)
Could not test with: 1.5.1 (6000.0.0f1 (4ff56b3ea44c)), 1.5.11 (6000.3.19f1) (Mac top menu bar app title localizations are not exported to Xcode)

Reproducible on: macOS 26.5.1 (M1 Max)
Not reproducible on: No other environments tested