Moodle Tracker MDLSITE-2289 Consider displaying language packs available for a plugin suggests that it would be helpful to see how many and what language packs are available for a particular plugin.
This might help Moodle admins of multilingual sites that are browsing the Moodle plugins page to consider installing a particular plugin.
It might also help Moodle translators to identify useful plugins, that have already been translated to other languages.
Please look at MDLSITE-2289 and vote for it-