this is an amazing app. every one must want to have this one. thank for the tip @androidwidgetcenter
Type, Voice, Hand writing, and Camera are 4 ways to input text on Google Translate for Android devices. To use your handwriting (via Stylus, S Pen, Finger) and draw words, do as follows:
1. Open "Google Translate" for Android (Make sure you have the latest version)
2. Choose the source language (As shown in the figure below)
3. Tap the handwriting icon on the bottom panel . (Note that Google Translate, doesn't support handwriting input for all the languages)
4. Now start drawing words (it is very useful for languages you have no idea how to type, like Chinese)