Culture and language are deeply related in that language can be used to reflect the culture of a particular society or the language can reflect the culture and its world view. Language is used to express and sustain culture and cultural associations that exist in a given society. Different ideas result from the use of different languages within a culture. World view is a structure consisting of ideas and beliefs through which a person interprets the world around him and also the world view determines how the person interacts with it. World view can be shaped by the culture and language that is common in a particular society. This is because people in a society use their language to express their culture thus expressing the world view in that society.
Language and culture are NOT fundamentally inseparable. At the most basic level, language is a method of expressing ideas. That is, language is communication; while usually verbal, language can also be visual (via signs and symbols), or semiotics (via hand or body gestures). Culture, on the other hand, is a specific set of ideas, practices, customs and beliefs which make up a functioning society as distinct.
A culture must have at least one language, which it uses as a distinct medium of communication to conveys its defining ideas, customs, beliefs, et al., from one member of the culture to another member. Cultures can develop multiple languages, or "borrow" languages from other cultures to use; not all such languages are co-equal in the culture. One of the major defining characteristics of a culture is which language(s) are the primary means of communication in that culture; sociologists and anthropologists draw lines between similar cultures heavily based on the prevalent language usage.
Languages, on the other hand, can be developed (or evolve) apart from its originating culture. Certain language have scope for cross-cultural adaptations and communication, and may not actually be part of any culture. Additionally, many languages are used by different cultures (that is, the same language can be used in several cultures).
Language is heavily influenced by culture - as cultures come up with new ideas, they develop language components to express those ideas. The reverse is also true: the limits of a language can define what is expressible in a culture (that is, the limits of a language can prevent certain concepts from being part of a culture).
Finally, languages are not solely defined by their developing culture(s) - most modern languages are amalgamations of other prior and current languages. That is, most languages borrow words and phrases ("loan words") from other existing languages to describe new ideas and concept. In fact, in the modern very-connected world, once one language manufactures a new word to describe something, there is a very strong tendency for other languages to "steal" that word directly, rather than manufacture a unique one itself. The English language is a stellar example of a "thief" language - by some accounts, over 60% of the English language is of foreign origin (i.e. those words were originally imported from another language). Conversely, English is currently the world's largest "donor" language, with vast quantities of English words being imported directly into virtually all other languages.
For many people, language is not just the medium of culture but also is a part of culture. It is quite common for immigrants to a new country to retain their old customs and to speak their first language amid fellow immigrants, even if all present are comfortable in their new language
Linguistic differences are also often seen as the mark of another culture, and they very commonly create divisiveness among neighboring peoples or even among different groups of the same nation. A good example of this is in Canada, where French-speaking natives of Quebec clash with the English-speaking majority. This sort of conflict is also common in areas with a great deal of tribal warfare. It is even becoming an issue in America as speakers of standard American English - mainly whites and educated minorities - observe the growing number of speakers of black English vernacular.
No one in other majors will be more sensitive than us about the relationship between language and culture since we are English majors. The exact nature of the relationship between language and culture has fascinated, and continues to fascinate, people from a wide variety of backgrounds. That there should be some kind of relationship between the sounds, words, any syntax of a language and the ways in which speakers of that language experience the world and behave in it seems so obvious as to be a truism. It would appear that the only problems deciding the nature of the relationship and finding suitable ways to demonstrate it