The short answer is that for the entire operating system. Unlike modern global head units, these older JDM models often require specific hardware modifications or English-encoded SD cards/DVDs to change the interface language.
Unlike global electronics that ship with multi-language packs, Japanese domestic market head units are built with firmware exclusively in Japanese. The menus, system voice prompts, and button labels are permanently hardcoded into the hard disk drive (HDD) firmware. There is no hidden menu or simple checkbox that will instantly convert the entire interface into English.
Search dedicated automotive forums or Japanese import groups to see if an English loading disc or SD card boot file has been compiled for the AVN669HD.
While some Eclipse models have limited English support, you often have to navigate through Japanese kanji to find the toggle. If your firmware supports multiple languages, follow this general path:
Locate the physical or AV hardware button on the bezel of the unit. Look at the touchscreen. You will see a grid of icons.
Some Eclipse models tie the interface language to the map data on the SD card.
: You can find discussions and professional advice on forums like JustAnswer where technicians specifically address the AVN669HD model.
Search for Japanese characters that look like English words (katakana) or kanji for language. Look for 言語 (Gengo) or 言語設定 (Language Settings).
: Point the camera directly at the AVN669HD display. The app will overlay English text directly onto the video feed.
button (usually the physical button with a "stack" or "grid" icon). Look for a icon for System Settings. If an option for "Language" exists, it will be written as (Gengo) or 表示設定 (Display Settings). (英語 - Eigo) if available. JustAnswer Manuals & Resources
Once you've selected your language, your main interface and navigation instructions should now be in your chosen tongue. If you run into any issues, the next section can help.
If "English" appears, select it and confirm. You may need to restart the car for changes to take effect.
Changing the language on an Eclipse AVN669HD from Japanese to English is not always straightforward, as many of these models were designed specifically for the Japanese domestic market (JDM) and do not have an English language option in the settings.
While you might not be able to change the menu text, you can often change the for DVDs:
Tap that option. A new pop-up list will appear.