At Sociolinguistic Cluster (http://www.soziolinguistika.org/) we are working on a system of indicators that will enable a description of the social situation of the Basque language. In the initial phase of the project we have defined four general indicators: language competence, possibility of use, language use and subjective aspects (motivation, opinion or behavior, for example). These four indicators will be analyzed in areas such as family, education, administration, socio-economics, free time or means of communication.
We would greatly appreciate any references regarding similar projects which could acquaint us with systems of linguistic indicators that are being used at an international level.
Thank you for your consideration.
Best regards.