Information about some very poorly documented Chadic languages has been in published in SIL Electronic Survey Reports. Here is a description of the contents of the series found on their website:
SIL Electronic Survey Reports (SILESR) are published by SIL International (Dallas, Texas). The series publishes reports on sociolinguistic surveys carried out by SIL field members and others. They are usually preliminary work papers and not presented as polished research. They are based on field notes and are in some cases the work of young sociolinguists with minimal training.
Here are reports on Chadic languages found in this series:
- Intelligibility Testing and Lexicostatistics of Buwal and Gavar
- A Rapid Appraisal Language Survey of the Baldemu Language (= Baldamu)
- A Rapid Appraisal Language Survey of Sharwa, a Language of Cameroon (Mayo-Tsanaga Division, Far North Province)
- A Rapid Appraisal Survey of Jimi, a Language of Cameroon (Mayo-Tsanaga Division, Far North Province)
- A Survey of Mofu Intelligibility for Cuvok Speakers
- Rapid Appraisal Sociolinguistic Research of Dugwor
- Language Survey of Gemzek and Gaduwa (= Zulgo)
- Sociolinguistic survey of the Kabalay language of Chad
- A Rapid Appraisal Survey of Mbedam
- Lexicostatistics and Intelligibility Testing Survey with Simplified SLOPE of the Mefele Language
- A Rapid Appraisal Language Survey of Tsuvan (Mayo-Tsanaga Division, Far North Province)
- A Sociolinguistic Survey of the Ubi Language of Chad
- Étude Sociolinguistique De La Langue zirenkel Du Tchad
- Enquête sociolinguistique de la langue Moubi du Tchad (= Mubi)
- Mabire: a dying language of Chad – with a 227-wordlist