Apple Language Kits provide Finder support for English in addition to the other language each installs. When you modify a file or folder name, the language kit defaults to its primary keyboard layout: Japanese to Kotoeri; Traditional Chinese to Pin yin; Simplified Chinese to Shuru Fangfa.
The Japanese Language Kit displays keyboard layouts based on the 'Font for views' selected in the Views control panel. When 'Osaka' is selected, the keyboard menu will offer U.S. System 7 and Kotoeri because Osaka supports both character sets. Selecting a Roman-only font like Palatino or Helvetica displays U.S. System 7 in the keyboard menu.
The Chinese Language Kit behaves the same way. Selecting 'Beijing' as the 'Font for views' will display 'Shuru Fangfa' and U.S. System 7 layouts in the keyboard menu because 'Beijing' supports both Simplified Chinese and Roman character sets.
Similarly, selecting 'Taipei' displays Traditional Chinese and U.S. System 7 layouts in the keyboard menu because 'Taipei' supports both Traditional Chinese and Roman character sets.