According to the official Google News Blog, the Google search page has 35 specific languages of virtual keyboard. This feature is currently supported in the following languages on the mail Google search page. The following are the languages:
Albanian
Arabic
Armenian
Basque
Belarusian
Bosnian
Bulgarian
Catalan
Croatian
Czech
Finnish
Galician
Georgian
Greek
Hebrew
Hindi
Hungarian
Icelandic
Kazakh
Kirghiz
Macedonian
Malayalam
Mongolian
Persian
Polish
Russian
Serbian
Slovak
Slovenian
Swedish
Tatar
Thai
Turkish
Ukrainian
Uzbek
If you use Google search in one of the languages listed below, you’ll see a small keyboard icon 
show up next to the search field, on both the Google homepage and search results page. Clicking on that keyboard icon brings up a virtual keyboard in your language. You can input text by either clicking on the on-screen keyboard or pressing the corresponding key…. more info on the Google Blog.
