how are speech and language interrelated?

Answer 1

language was developed for, by and in speech, and for face to face communication. Therefore every linguistic communication that is not spoken and not face to face has to make up for it by adding information.

Answer 2

Linguistically, language is a system of elements, structured and nicely (although not always) arranged according to certain rules, while speech is an actual use of those elements. In this way, language is viewed as a material 'store' where we can get whatever we need at a given moment in communication and use it.

A classical metaphorical illustration of how it works is the game of chess. We know what it consists of, a chess board, figures, and a set of rules, this is a material and theoretical basis for a particular game. When someone plays chess, they use the figures, chess board and rules to create something in that given time when they play. They have thousands of variants out of which they choose, etc. So this is basically how language-speech work together (in fact, such duality can be observed in many other things in life) ...

Answer 3

They are both forms of self expression and communication with others. Speech is a formal way of communicating using language, i.e. a formal system of communication using mutually accepted sounds. Language can be communication by body movements and facial expression as well as the uttering of words. Certain words written down are ambiguous until interpreted by the use of certain tones of voice or gestures. For example, dead pan humour relies a twinkle in the eye or a twitch of the lips for the other party to realise that the words are not to be taken literally. There is a whole doctrine about communication through language other than speech (eurythmy, the invention of Rudolph Steiner).