Historical linguistics is not a method used in language documentation, but rather a field of study that examines the historical development of languages.

Participant observation is a method used to document the language's use in everyday life, by observing and recording the interactions between speakers of the language.

Focus group interviews are not typically used in language documentation, as they are more commonly used in market research and social science research.

Corpus collection in language documentation involves collecting a large sample of the language's text, audio recordings, and video recordings, in order to create a comprehensive record of the language.

Discourse analysis is not a technique used in corpus analysis, but rather a field of study that examines the structure and organization of discourse.

Language revitalization involves reviving a language that is no longer spoken, promoting the use of a language that is endangered, and documenting a language that is at risk of extinction.

Language apps are not typically used in language revitalization, as they are more commonly used for language learning.

Language endangerment assessment involves identifying languages that are at risk of extinction, assessing the factors that contribute to language endangerment, and developing strategies for language revitalization.

Climate change is not typically considered a major factor that contributes to language endangerment.

Language documentation plays a crucial role in language revitalization by providing a record of the language for future generations, helping language learners acquire the language, and supporting language revitalization efforts.

Lack of time is not typically considered a major challenge faced in language documentation, as projects are often conducted over a long period of time.

Ethical considerations are crucial in language documentation to ensure that the rights of speakers are respected, the data collected is accurate and reliable, and the language is documented in a culturally appropriate manner.

Objectivity is not typically considered a common ethical principle in language documentation, as it is often difficult to maintain complete objectivity when working with speakers and communities.

Technology plays a crucial role in language documentation by facilitating data collection and analysis, providing access to language resources, and supporting language revitalization efforts.

GPS devices are not typically used in language documentation, as they are more commonly used for navigation and tracking.