Final answer:
The concept that reality is constructed through language is known as the Sapir-Whorf hypothesis or linguistic relativity, suggesting that language shapes our perception of reality and different groups can have their own valid realities.
Step-by-step explanation:
The idea that reality is constructed by the use of language is referred to as the Sapir-Whorf hypothesis or linguistic relativity. This concept suggests that the language a person speaks shapes their perception of reality. Thus, by controlling language, different societies or groups can create distinct realities that are all considered valid within their respective linguistic contexts. Language not only reflects but also structures our experience of the world. The phrase 'Post-Modernism' also delves into similar concepts, examining how language contributes to social constructs of reality. Conversely, the early 20th-century movement of 'linguistic analysis' posited that clarity and precision in language usage could resolve philosophical problems attributed to language ambiguities.