I will take a closer look when I update to 5.2 to see if the translation works and then update if needed.

Thanks Johannes, merged into core already and will be part of v5.2 release.

Path: /locale/ossn.en.php

'male:gendercolor' => '#01ADEF',
'female:gendercolor' => '#ED008C',
'ossn:admin:settings:off' => 'malebligita',
'ossn:admin:settings:on' => 'ebligita',
'ossn:admin:settings:saved' => 'Agordoj konservita!',
'ossn:admin:settings:save:error' => 'Ne povas konservi agordon! Bonvolu kontroli vian protokolan dosieron (error_log).',

Path: components/OssnNotifications/locale/ossn.en.php

'ossnnotifications' => 'Sciigoj',
'ossn:notifications:admin:settings:close_anywhere:title' => 'Fermu sciigon per alklaki kie ajn',
'ossn:notifications:admin:settings:close_anywhere:note' => ' fermos sciigon per alklaki kie ajn en la paĝo',

Path: components/OssnGroups/locale/ossn.en.php

'group:memb:make:owner' => 'Fari grupan estron',
'group:memb:make:owner:confirm' => 'Atentu! Per ĉi tiu ago >> %s << fariĝos la novan estron de la grupo kaj vi tute perdos viajn administrajn rajtojn. Ĉu vi vere volas daŭrigu?',
'group:memb:make:owner:admin:confirm' => ''Atentu! Per ĉi tiu ago >> %s << fariĝos la novan estron de la grupo kaj la estinta estro tute perdos siajn administrajn rajtojn. Ĉu vi vere volas daŭrigu?',
'group:delete:cover' => 'Forigi kovrilan bildon',
'group:delete:cover:error' => 'Eraro okazis dum forigo de la kovrila bildo',
'group:delete:cover:success' => 'La kovrila bildo estas sukcese forigita',

Path: components/OssnSmilies/locale/ossn.en.php

'ossn:smilies:admin:settings:close_anywhere:title' => 'Fermu la ridetulujon per alklaki kie ajn',
'ossn:smilies:admin:settings:close_anywhere:note' => ' fermos la ridetulujon per alklaki kie ajn en la paĝo'

I'm not sure how accurate the translation will be yet as I need to see the end results to be sure. But it is at least accurate to the english translation above.

Hi Johannes, Can you provide translation for (please ignore path i mentioned here) as soon as you can because we would like to release beta of v5.2:

Path: /locale/ossn.en.php

'male:gendercolor' => '#01ADEF',
'female:gendercolor' => '#ED008C',
'ossn:admin:settings:off' => 'disabled',
'ossn:admin:settings:on' => 'enabled',
'ossn:admin:settings:saved' => 'Settings saved!',
'ossn:admin:settings:save:error' => 'Cannot save settings! Please check your error_log file.',

Path: components/OssnNotifications/locale/ossn.en.php

'ossnnotifications' => 'Notifications',
'ossn:notifications:admin:settings:close_anywhere:title' => 'Close notification windows by clicking anywhere',
'ossn:notifications:admin:settings:close_anywhere:note' => ' closes any notification window by clicking anywhere on the page',

Path: components/OssnGroups/locale/ossn.en.php

'group:memb:make:owner' => 'Make group owner',
'group:memb:make:owner:confirm' => 'Attention! This action will make >> %s << the new owner of the group and you will lose all of your group admin privileges. Are you sure to proceed?',
'group:memb:make:owner:admin:confirm' => 'Attention! This action will make >> %s << the new owner of the group and the former owner will lose all of his group admin privileges. Are you sure to proceed?',
'group:delete:cover' => 'Delete Cover',
'group:delete:cover:error' => 'An error occurred while deleting the cover image',
'group:delete:cover:success' => 'The cover image was successfully deleted',

Path: components/OssnSmilies/locale/ossn.en.php

'ossn:smilies:admin:settings:close_anywhere:title' => 'Smiley box closing by clicking anywhere',
'ossn:smilies:admin:settings:close_anywhere:note' => ' closes the smiley selector box by clicking anywhere on the page

Thanks Johannes, We shall merge it with core in next upgrade