Resumen
A corpus of an understudied language usually has documentary-linguistic nature and comprises all text material available in a particular language. However, without resorting to text selection, it is impossible to obtain a representative and balanced sample of language use. Lack of these two characteristics makes a corpus almost useless for any kind of quantitative research. Nevertheless, corpora of understudied languages comply with a wide range of language documentation objectives. Furthermore, they can serve as evidence of the existence of word forms or grammatical features in texts that meet specific search criteria. If such corpora have well-elaborated linguistic annotation, they can complement grammatical descriptions and dictionaries, standing out against common text collections due to their digital format. They are especially suitable for typological research, when one has to deal with a huge amount of data in different and unrelated languages.