7. The method of claim 1 , wherein, for each of the customized dictionaries, the blending of the frequently used words from each of the communication categories is determined based at least in part on the social information of the particular user.
7. The method of claim 1 , wherein, for each of the customized dictionaries, the blending of the frequently used words from each of the communication categories is determined based at least in part on the social information of the particular user. 8. The method of claim 7 , wherein: the customized dictionaries are constructed for one or more activities that the particular user performs using one or more electronic devices; and for each of the customized dictionaries constructed for a corresponding one of the activities, the blending of the frequently used words from each of the communication categories is determined further based on the corresponding activity.