One of the reasons that Yahoo! Go 3.0 might show a mixture of languages arises from the possibility that, although the device itself is set for another country's language, we configured Yahoo! Go 3.0 with content suitable for the country you first chose in the browser page during the download process. If county-specific information is not available in the chosen language, then Yahoo! provides the information in English.
The language set in the device determines the language of the key labels in the display. The language you chose might be different from the language of the Yahoo! content language. Check the phone manual on how to change the device's language. If your device is set to a language other than those Yahoo! Go 3.0 provides, the labels in the display for keys are shown in English.