Non-native speech databases

This paper presents a review of already collected non-native speech databases. Although the number of non-native speech databases is significantly less than the one of common speech databases, there were already a lot of data collection efforts taken at different institutes and companies. Because of the comparably small size of the databases, many of them are not available through the common distributors of speech corpora like ELDA or LDC. This leads to the fact that it is hard to keep an overview of what kind of databases have already been collected, and for what purposes there are still no collections. With this paper we hope to provide a useful resource regarding this issue.