There are two words, "its" and "it's". They sound exactly the same. "ITS" is an adjective form of the pronoun "it", but confusingly it does not have an apostrophe as do most possessives. "ITS" describes something attributable to the specified or unspecified antecedent. ("Its size is variable.") "IT'S" , on the other hand, is NOT a possessive using an apostrophe, but rather a contraction of the words "it is". ("It's going to rain.) So, when you can replace the word with "it is", use the apostrophe form "it's". Otherwise the apostrophe form is not used.
The point at which a language no longer has competent users is referred to as language death.
America
A point. (Also time, language, concepts, etc.)
A language point refers to a specific aspect or feature of a language that is being taught or studied. It could include grammar rules, vocabulary usage, pronunciation patterns, or any other linguistic element that is the focus of instruction.
Culture
Depends on your point of view
A floating point constant value.
A : voice is the language an author uses to tell a story, while point of view is the perspective from which a narrator tells a story.
In simple language, a vertex is a point. Vertices are the plural
Wikipedia can be a starting point.
English
No, a dialect is a specific form of a language spoken in a particular region or by a particular group of people. It is a variation of the standard language, characterized by unique vocabulary, grammar, and pronunciation.