Conventional wisdom indicates that learning a second language is enriching for everyone, especially for little kids. Rosetta Stone has already begun capitalizing on its decades-long language program for the grade-school (and below) set, and has now added a new app to its Rosetta Stone Kids Lingo iPhone brand: Word Builder.

“We didn’t see a lot of players in the space, and we saw an opportunity to help pioneer kids education for language learning,” said West Stringfellow, CPO at Rosetta Stone, in a phone call. “Especially learning two languages at a time.”

The purpose of the series is to enable kids to learn how to read in English and converse in Spanish, with the help of fun and friendly characters. Stringfellow says that the Word Builder app is a natural progression from the first app in the series, Letter Sounds, and is geared for a broader audience. Whereas the first app…