The corpora of the Language Acquisition Group at the MPI for Psycholinguistics (Nijmegen, NL) include first (L1) as well as second language (L2) acquisition data from children and adults.

Content:

First (L1) & second language (L2) acquisition data.
Longitudinal & snapshot data
Children & adults data
Control data of native speakers of different languages
Spontaneous and elicited data
Partly transcribed and annotated data
Additional info files (e.g. project or language description)

Data of following languages are available:

Czech (L1 & L2)
Chinese (L1)
Dutch (L2)
English (L1 & L2)
French (L2)
German (L1 & L2)
Hindi (L1)
Russian (L1)
Swedish (L2)
Tamil (L1)
Tzeltal (L1)

Processing steps:
Recording tapes
Digitizing tapes to Digital Master Files (DMF)
Definition of sessions (=analysis unit) by meta describing the DMF
Creating session data (digital media files)
Integration of meta data and media into the Browsable corpus structures
Annotation of session data
Linking of meta data, media and annotations for further use in the Corpus Browser (XML)