Semantic change is not a type of diachronic change because it does not involve a change in the form of a language, but rather a change in the meaning of a word or phrase.

The Great Vowel Shift is an example of sound change because it involved a change in the pronunciation of vowels in the English language.

The loss of the genitive case is an example of grammatical change because it involved a change in the way that nouns are used in a language.

The addition of a new word is an example of lexical change because it involves a change in the vocabulary of a language.

All of the above factors can influence diachronic change. Contact with other languages can lead to the borrowing of new words and grammatical structures. Social change can lead to changes in the way that language is used. Technological change can lead to the development of new words and phrases.

Lexical change is often caused by contact with other languages because it involves the borrowing of new words and phrases.

Grammatical change is often caused by social change because it involves changes in the way that language is used.

Lexical change is often caused by technological change because it involves the development of new words and phrases.

The addition of the word "computer" is an example of a diachronic change that was caused by contact with other languages because it is a borrowed word.

The change of the word "gay" from meaning "happy" to meaning "homosexual" is an example of a diachronic change that was caused by social change because it reflects a change in the way that society views homosexuality.

The addition of the word "computer" is an example of a diachronic change that was caused by technological change because it is a new word that was created to describe a new technology.

The change of the word "gay" from meaning "happy" to meaning "homosexual" is an example of a diachronic change that is still in progress because it is a change that is still happening in some parts of the world.

The Great Vowel Shift is an example of a diachronic change that is complete because it is a change that happened in the past and is no longer happening.

The Great Vowel Shift is an example of a diachronic change that is irreversible because it is a change that happened in the past and cannot be undone.

The addition of the word "computer" is an example of a diachronic change that is reversible because it is a change that can be undone by simply removing the word from the language.