The Global Outreack Kit (GOKit) has short 3-7 minute gospel messages in more than 2500 languages and dialects. It can be used for both language diagnosis/identification, and also for evangelism.
The GOKit is available on a 4GB micro-SD card that goes into a cell phone. Recordings can be searched for by language/dialect name.
The number of languages and dialects on the GOKit is constantly increasing.