1. A system for real-time tracking of at least one of a position, orientation, and movement of a tongue of a user during speech comprising: a tracer unit; magnetic sensors; a speech characteristic sensor; a sensor control unit; a computing platform; and a feedback system; wherein the tracer unit is adapted to be non-obstructively affixed at a location on the tongue of the user; wherein the magnetic sensors are configurable to measure a magnetic flux density at the location of the tracer unit, the magnetic sensors in non-obstructive proximity to the tracer unit and mouth of the user; wherein the speech characteristic sensor configurable to detect a speech characteristic selected from the group consisting of sound produced by the user, an air flow produced by the user, a lip movement/gesture produced by the user, a physical contact between the tongue and a palate of the user, an articulator muscle movement produced by the user, and an electrical activity of a brain of the user; wherein the sensor control unit is configurable to: receive a magnetic sensor signal from a magnetic sensors; receive a speech characteristic sensor signal from the speech characteristic sensor; synchronize the magnetic sensor signal with the speech characteristic sensor signal; and transmit the synchronized sensor signal to the computing platform; wherein the computing platform is configurable to: perform a tongue tracking signal processing algorithm, the algorithm including minimizing a cost function that correlates to the measured magnetic flux density and an estimated magnetic flux density at the location of the tracer unit, the location of the tracer unit being defined within a three-dimensional, non-discrete space; determine, based on the algorithm, one or more of a position, orientation, and movement of the tracer unit in real time within the three-dimensinal, non-discrete space; generate a combination of the one or more determined position, determined orientation, and determined movement of the tracer unit with the speech characteristic sensor signal; and transmit the combination to the feedback system; and wherein the feedback system is configurable to provide assistive speech-related feedback to the user in real time, based on the combination, wherein the assistive speech-related feedback is selected from the group consisting of a representation of temporally and spatially continuous tracking of the user's tongue movement during speech of a target phoneme within the three-dimensional non-discrete space, an interactive game to quantify and monitor the user's progress, and vibrotactile biofeedback comparing speech of the user to correct speech of a target phoneme.