Penpower ViaTalk (Win) - Manual (Page 10)

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2. If you want to change Keyboard Language in the Input Method,
please go to [Settings]/ [General]/ [Keyboard]/ [Keyboard]. You
can delete any language's keyboard by clicking [Edit] on the top
right of the screen. Or click [Add New Keyboard] below to add
more language's keyboard.
3. Click the microphone icon , and you can start to talk. The
interpreted speech will be sent to the computer in text form
immediately.