1. A method for building a reference system for determining, by a computing device, a stress position of a new word form, the method comprising: sorting, in a reverse lexicographic order, a plurality of word forms, each word form of the plurality of word forms being marked with a particular stress position, in order to generate a plurality of sorted word forms, clustering the plurality of sorted word forms into a plurality of clusters of word forms such that the plurality of clusters of word forms comprises a plurality of terminal clusters, each terminal cluster of the plurality of terminal clusters comprising word forms having both: (i) a same ending being a terminal common ending, and (ii) a same stress position, a combination of the terminal common ending and said same stress position being unique; building, using the plurality of terminal clusters, the reference system for determining the stress position of the new word form, the reference system having a reference to at least one terminal cluster of the plurality of terminal clusters, the at least one terminal cluster comprising an indication of the particular stress position proper to word forms which are included in that respective terminal cluster.
7. The method of claim 1 , further comprising, before the sorting the plurality of word forms, acquiring, from a supplying device, the plurality of word forms.