Google Search by Voice is now available for German, Italian, Spanish and French. Search by voice is an important feature of the Quick Search Box app for Android, Google Mobile App for iPhone and Blackberry. The nice thing is that you don't have to download an update for none of the applications, as the new languages are automatically recognized.
If your phone runs Android 2.1 or later, and you've Quick Search Box installed — just tap the microphone icon to start a voice-powered search. iPhone and BlackBerry users who already have Google Mobile App installed can enable voice search by selecting new languages from settings panel within app. If you've Android 1.6 or 2.1 (Donut or Eclair), and you have already installed Search by voice application, voice search will return recognition results for French, German, Italian or Spanish if your phone has one of those languages chosen in "Language and keyboard" settings.