A Tongue-Machine Interaction System (TMIS) can be a valuable tool for tongue strengthening training which could contribute to rehabilitation of patients with dysphagia. Consequently, a TMIS would also help in mending the oropharyngeal pattern of swallowing. The adoption of TMIS's in clinical practice has been limited in the past since many of them required patients to have a palatal plate or some other 'component of interactivity' mounted in the mouth and/or on the tongue. This paper discusses design and functionality related problems of tongue-computer interaction (TCI) devices and demonstrates incorporation of important TCI features in a TMIS. The design and implementation of a portable, low-cost, minimally invasive and, easy to learn TMIS having four major modules is presented. One of the system modules houses an array of infrared (IR) light emitting diodes. A connected module generates tongue position-based signals and enables tongue to either operate a mouse, use a virtual keyboard or press a button to operate appliances. A Wii remote IR camera and a computer serve as the other two modules. When tested on eight male and three female healthy participants, the TMIS achieved 42° horizontal and 33° vertical range of operation with the maximum signal range of 5 meters. Users could type up to 7.2 words per minute using the TMIS. Overall, the reported TMIS can support indirect exercise for tongue strengthening and treating swallowing difficulties.