Translatewiki.net logs,
[25-Feb-2020 05:30:24 UTC] Exception occurred while processing group: eol-website. Exception: MWException: Parsing /resources/projects/eol-website/config/locales/pt-BR.yml failed: Reserved plural keywords mixed with other keys: other, pie_prompt. in /srv/mediawiki/tags/2020-02-19_15:27:30/extensions/Translate/ffs/SimpleFFS.php:131 Stack trace: #0 /srv/mediawiki/tags/2020-02-19_15:27:30/extensions/Translate/messagegroups/FileBasedMessageGroup.php(54): SimpleFFS->read('pt-br') #1 /srv/mediawiki/tags/2020-02-19_15:27:30/extensions/Translate/utils/MessageGroupCache.php(214): FileBasedMessageGroup->load('pt-br') #2 /srv/mediawiki/tags/2020-02-19_15:27:30/extensions/Translate/utils/ExternalMessageSourceStateComparator.php(94): MessageGroupCache->isValid(0) #3 /srv/mediawiki/tags/2020-02-19_15:27:30/extensions/Translate/utils/ExternalMessageSourceStateComparator.php(83): ExternalMessageSourceStateComparator->processLanguage(Object(FileBasedMessageGroup), 'pt-br', Object(MediaWiki\Extensions\Translate\MessageSync\MessageSourceChange)) #4 /srv/mediawiki/tags/2020-02-19_15:27:30/extensions/Translate/scripts/processMessageChanges.php(86): ExternalMessageSourceStateComparator->processGroup(Object(FileBasedMessageGroup), Array) #5 /srv/mediawiki/tags/2020-02-19_15:27:30/maintenance/doMaintenance.php(107): ProcessMessageChanges->execute() #6 /srv/mediawiki/tags/2020-02-19_15:27:30/extensions/Translate/scripts/processMessageChanges.php(176): require_once('/srv/mediawiki/...') #7 {main}
Cause of issue: https://github.com/EOL/eol_website/commit/d1cf755bb82982c35b109d2e8b27c3251a174218#diff-e511459ce3b2add887868cb235492a53R726
There are other instances of this - https://github.com/EOL/eol_website/blob/7a579e184a551b78f118753c4ec7e870e0528a02/config/locales/fr.yml#L1117
Have to investigate what is causing this particular error for pt-br language.