How languages evolve

1. Language Genealogy

1.1. Tracing languages as far as they can

1.1.1. Proto-language

1.2. Language Family

1.2.1. Grammar and Syntax

1.2.2. Basic vocabulary

1.2.3. Regular sounds

2. Linguistic

2.1. Can determine

2.1.1. Relationships

2.1.2. Historical clues

2.1.2.1. Geographic origin and Lifestyles

2.1.2.1.1. Based on native words and borrowed

2.1.3. Earlier languages with no written records

2.1.4. Specific steps in their evolution

3. Linguistics problems

3.1. Differences between languages and dialects

3.1.1. Is a matter of changing political and national considerations

3.2. Limits of evidence

3.2.1. Can't be found common ancestors

4. The tower of Babel

4.1. The myth where everybody spoke the same language

4.1.1. They split into many groups

5. Language Evolution

5.1. Migration and isolation

5.2. Different conditions and food

5.3. Distinct neighbors

5.3.1. Different languages

5.3.1.1. Similar dialects with varied pronunciation and vocabulary