There is little scientific data on the point, but evidently people do speak to themselves. - David Crystal

The structural properties of the language are many and complex, but at least they are finite and fairly easy to identify: there are only so many sounds, letters, and grammatical constructions, and although there is a huge vocabulary, at least the units are determinate and manageable.

Micro computers used as word processors complement the audio facilities, enabling the interactive teaching of all four language skills reading, listening, speaking and writing.

Language may not determine the way we think, but it does influence the way we perceive and remember, and it affects the ease with which we perform mental tasks.