Actually, those language you attached is controlled by the module's title itself as listed below at Backend>Extension>Module

Leaderboard = mod_easysocial_leaderboard
Recent Albums = mod_easysocial_albums
Recent Users = mod_easysocial_users
Search For people = mod_easysocial_dating_search
Online Users = mod_easysocial_users

Unfortunately, we cant achieved this feature currently. :( But it would be best if you can submit a feature request regarding this issues by creating a new ticket on the forums and set it to "Feature Request", so everyone else could vote for it, the more people request on this, and we will priority consider it.

Related ticket:

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