But the interaction between us as humans and language is a two way lane. Thats to say, the human nature affects language (as explained previously). Not only that, language affects our abilities and understanding of our surrounding, it might even cripple the human understanding.
This view is usually called "Linguistic Determinism", which simply means that human thoughts is determined by (or limited by) their language.
In a study of a Brazilian tribe whose language only defines the numbers one and two, it has been shown that those people had difficulties recognizing groups of four items or more. For that tribe, numbers are one, two, and "many"!! In an experiment, the members of that tribe were shown a random number of items (with a maximum of ten items), and were asked to make another pile that contains the same number of items. For piles made up of one, two, or three items, the members were able to make such a pile. Most of them failed to create piles of four or more items!!
The above study shows that because the tribe members couldn't verbally specify the number of items in each pile, they consequently failed to represent that number in piles.
Also, think about why certain linguistics professionals insist that in order to eliminate sexism in our communities, we should use non-sexist language. For example, "chairperson" replaces "chairman", "mailperson" replaces "mailman", and say "businessperson" replaces "businessman". This replacement might seem useless "political correctness", but experts believe that changing the use of such words can dramatically catalyze fighting sexism.
Humans since the beginning were aware of the differences between males and females, and they consequently reflected that in their language. Humans ever since starting of thinking of everything as male or female, black or white, ...etc. Thats an example of how our world affected our language, and consequently our language affected our thoughts. It is hypothesized that changing language can act in the reverse manner of reshaping our thoughts.
In extreme cases, some believe that what we define as "logic" is merely a consequence of the grammar we use in languages, and that language eliminates all forms of objectivity. If Linguistic Determinism was true, one has to think of how our personality, perceptions, and views are limited by the language we acquired as infants. Wittgenstein recognizes this limitation when he says:
"The limits of my language are the limits of my world. All I know is what I have words for." (source)
In this series:
Language Acquisition - Part 1: General Discussion
Language Acquisition - Part 2: The Influence Of Physiological Formation
Language Acquisition - Part 3: Deep Structure Hypothesis
Language Acquisition - Part 4: Ambiguities
Language Acquisition - Part 5: The Problem Of Representation
Language Acquisition - Part 6: Linguistic Determinism Hypothesis
Language Acquisition - Part 7: Possible Applications For The Investigation