What have studies of people with brain damage injury and/or neuroimaging studies told us about the neuropsychology of language?

Language is unique among mental functions in that only humans truly possess a language system, and it is one of the most fundamental ways in which humanity excels. Language is second nature to humans we do not really have any conscious thought about how to express it, it just happens. However language is a highly complex system and involves many aspects including representation, comprehension and communication via symbolic information….(short extract)