Final answer:
All languages are complex and capable of expressing the full range of human thought. The concept of 'primitive language' is misleading, and instead, languages can be considered indigenous or historically complex. Languages that have evolved from the same older language are related, and revitalization efforts can revive dormant languages.
Step-by-step explanation:
The term 'primitive language' suggests a language with less complexity or development compared to others. However, this concept is misleading as all languages are complex and capable of expressing the full range of human thought. Each of the approximately seven thousand languages spoken in the world today has developed complex structures and systems. Rather than categorize languages as primitive, it's more accurate to say that languages can be indigenous or have a long, complex history with transformations over time.
Related languages are those that have evolved from the same older language. For instance, Spanish, French, and Italian are related languages because they all evolved from Latin. Conversely, words that are most likely to be borrowed from another language typically include technological terms or those related to culture and trade, such as words for plants, animals, or food.
It is also important to note that a language can be revived or revitalized even if it has fallen out of everyday use, as in the case of language revitalization efforts. Thus, while no languages today are 'primitive' in the outdated sense of the word, there are languages that are at risk of becoming dormant without efforts to maintain and revitalize them.