A gesture to speech conversion device may receive indications of user gestures via at least one sensor, the indications identifying movement in three dimensions. A 2-dimensional (2D) plane on which a beginning of the movement and an end of the movement is substantially planar and a third dimension orthogonal to the 2D plane may be determined. A change of the movement in a direction of the third dimension in a course of the movement occurring on the 2D plane is detected. The change of the movement in the third dimension is mapped to an emphasis in the movement. The movement is transformed into speech with emphasis on a part of the speech corresponding to a part of the movement having the detected change.