1. A method for use with a system including a first document containing at least some information in common with a spoken audio stream, the method performed by at least one computer processor executing computer program instructions to perform steps of: (A) identifying text in the first document, wherein the text represents a concept; (B) identifying, based on the identified text and a repository of finite state grammars, a plurality of spoken forms of the concept, including at least one spoken form not contained in the first document, wherein all of the plurality of spoken forms have the same content as each other; (C) replacing the identified text with a finite state grammar specifying the plurality of spoken forms of the concept to produce a second document, wherein the finite state grammar includes the identified text and text other than the identified text; (D) generating a document-specific language model based on the second document, comprising generating at least some of the document-specific language model based on the finite state grammar; and (E) using the document-specific language model in a speech recognition process to recognize the spoken audio stream and thereby to produce a third document.