The Rosetta Stone software uses a combination of images, text, and sound, with difficulty levels increasing as the student progresses, in order to teach various vocabulary terms and grammatical functions intuitively, without drills or translation. They call this the "Dynamic Immersion method". According to the company, the software is designed to teach languages the way first languages are learned. However, the refusal of Rosetta Stone to use the first language to establish meaning gives a product that is of variable utility, depending on how accurately the student can guess what the foreign language utterance really means based on pictures that can be imprecise or even reused to convey a different meaning.