Language proficiency is not a common method for measuring the success of language revitalization efforts, as it is difficult to measure and can vary widely among speakers.

The most direct measure of the success of a language revitalization effort is the number of speakers, as this indicates the extent to which the language is being used and transmitted to new generations.

Home is not a domain in which language use can be measured to assess the success of a language revitalization effort, as it is difficult to measure and can vary widely among families.

Language ideology is the term used to describe the attitudes and beliefs that people hold about a particular language.

Language proficiency is not a factor that can contribute to the success of a language revitalization effort, as it is a measure of the success of the effort itself.

Language planning is the term used to describe the process of planning and implementing strategies to revitalize a language.

Language policy changes are not a common strategy used in language revitalization efforts, as they are typically implemented by governments and can be difficult to achieve.

Language transmission is the term used to describe the process of transmitting a language from one generation to the next.

Language revitalization is not a factor that can contribute to the decline of a language, as it is the process of reversing language loss and promoting language use.

Language shift is the term used to describe the process of replacing one language with another.

Language transmission is not a common method for measuring language vitality, as it is difficult to measure and can vary widely among communities.

Language revitalization is the term used to describe the process of bringing a language back from the brink of extinction.

Lack of language proficiency is not a common challenge faced by language revitalization efforts, as it is a measure of the success of the effort itself.

Language loss is the term used to describe the process of losing a language.

Reverse language loss is not a common goal of language revitalization efforts, as it is the ultimate goal of the effort itself.