If you need to use the device without a full firmware conversion, you can identify key settings by looking for these Japanese terms: English Term Japanese Text Language Audio オーディオ Navigation Bluetooth ブルートゥース Burūtūsu English Method 1: Using Real-Time Translation (Free)
. This involves reflashing the unit's software, which is the only way to get a permanent, native-feeling English interface. Google Lens (The "Cheat Sheet") : For daily use, the most reliable free method is using the Google Lens
Note: If the reset does not bring up a language selection screen, the unit is defaulting to a regional language locked by firmware. You may need Method 4.
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