1. A speech recognition system comprising: an input for receiving a spoken utterance by a user of said speech recognition system; a speech recognition dictionary including a plurality of orthographies potentially recognizable on a basis of the spoken utterance; a first processing unit operative to process said speech recognition dictionary to derive on the basis of the spoken utterance a list of orthographies, said list containing a plurality of orthographies, each orthography in said list being a candidate having a certain probability to correspond to the spoken utterance; a standard text lexicon including a plurality of orthographies; orthography insertion unit for inserting at least one orthography from said standard text lexicon into said list to form an augmented list.