Using speech synthesis, this app speaks gibberish in different voices. English is free, other languages and countries are $0.99 each.

Languages include:
Arabian, Czech, Danish, German, Greek, English (Australia, Great Britain, India, Ireland,United States,South Africa), Spanish (Spain, Mexico), Finnish, French (France, Canada), Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Dutch (Netherlands, Belgium), Norwegian, Polish, Romanian, Russian, Slovakian, Swedish, Thai, Turkish, and Chinese (China, Hong Kong, Taiwan).