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In mid-2006, the Indonesia Survey Team from SIL International conducted a sociolinguistic survey investigating vernacular language vitality within the Tondano language [tdn].
The team conducted field research for two weeks in May 2006. Eight villages, whose residents
reportedly still had strong use of the Tondano language, were visited. Three qualitative assessment tools were used: a group sociolinguistic questionnaire, a self-evaluation questionnaire, and a village head (kepala desa) questionnaire.
This research found that the language vitality of the Tondano language is threatened and decreasing, based on clear trends seen in the correlation between decreasing age and decreasing Tondano language proficiency, as well as the reportedly sparing use and lack of Tondano language
dominance in any assessed domain of speech.