You’ve spilled coffee on your keyboard. The a, e, i, o, u, and r keys have stopped working. Now try to search Google for the nearest computer repair shop. The pain of typing on this broken keyboard is similar to what many people searching in non-English languages feel when trying to type today. Typing searches on keyboards not designed for your languages can be frustrating, even impossible.
Our user research has shown that many people are more comfortable formulating search queries in their own language but have difficulty typing these queries into Google. (Try typing नमस्ते on a keyboard with English letters.) To overcome the difficulty they face in typing in their local language scripts, some people have resorted to copying and pasting from other sites and from online translation tools. But there’s an easier way — a virtual, or “on-screen” keyboard, lets you type directly in your local language script in an easy and consistent manner, no matter where you are or what computer you’re using.
Kilde: Official Google Blog