Thread:Support/About Europeana:Activerecord.attributes.user.institution/en/reply

There are quite some more Europeana messages, which have no english text as well as no description, moreover they are not marked as optional. I found these messages:
 * Europeana:Formtastic.hints.attachment.metadata.creator family name/en
 * Europeana:Formtastic.hints.attachment.metadata.lang other/en
 * Europeana:Formtastic.hints.attachment.metadata.location map/en
 * ‎Europeana:Formtastic.hints.attachment.metadata.location zoom/en
 * Europeana:Formtastic.hints.attachment.metadata.file type/en
 * Europeana:Formtastic.hints.attachment.metadata.license/en
 * Europeana:Formtastic.hints.attachment.metadata.notes/en
 * Europeana:Formtastic.hints.attachment.metadata.page total/en
 * Europeana:Formtastic.hints.contribution.metadata.alternative/en
 * Europeana:Formtastic.hints.contribution.metadata.character1 dob/en
 * Europeana:Formtastic.hints.contribution.metadata.character1 dod/en
 * Europeana:Formtastic.hints.contribution.metadata.character1 family name/en
 * Europeana:Formtastic.hints.contribution.metadata.character1 given name/en
 * Europeana:Formtastic.hints.contribution.metadata.character1 pob/en
 * Europeana:Formtastic.hints.contribution.metadata.character1 pod/en
 * Europeana:Formtastic.hints.contribution.metadata.character2 dob/en
 * Europeana:Formtastic.hints.contribution.metadata.character2 dod/en
 * Europeana:Formtastic.hints.contribution.metadata.character2 family name/en
 * Europeana:Formtastic.hints.contribution.metadata.character2 given name/en
 * Europeana:Formtastic.hints.contribution.metadata.character2 pob/en
 * Europeana:Formtastic.hints.contribution.metadata.character2 pod/en
 * Europeana:Formtastic.hints.contribution.metadata.collection day/en
 * Europeana:Formtastic.hints.contribution.metadata.editor pick/en
 * Europeana:Formtastic.hints.contribution.metadata.editor pick sig/en
 * Europeana:Formtastic.hints.contribution.metadata.editor pick text/en
 * Europeana:Formtastic.hints.contribution.metadata.lang other/en
 * ‎Europeana:Formtastic.hints.contribution.metadata.location map/en
 * Europeana:Formtastic.hints.contribution.metadata.location zoom/en
 * Europeana:Formtastic.hints.contribution.metadata.notes/en
 * Europeana:Formtastic.hints.contribution.metadata.summary/en
 * Europeana:Formtastic.hints.contribution.metadata.ticket/en
 * ‎Europeana:Formtastic.hints.contribution.contribution.edit.catalogued by/en
 * Europeana:Formtastic.hints.user.contact.new.age/en
 * Europeana:Formtastic.hints.user.contact.new.country/en
 * Europeana:Formtastic.hints.user.contact.new.gender/en
 * Europeana:Formtastic.hints.user.contact.new.locality/en
 * Europeana:Formtastic.hints.user.contact.new.postal code/en
 * Europeana:Formtastic.hints.user.contact.new.region/en
 * Europeana:Formtastic.hints.user.contact.new.street address/en
 * ‎Europeana:Formtastic.hints.user.contact.create.age/en
 * Europeana:Formtastic.hints.user.contact.create.country/en
 * Europeana:Formtastic.hints.user.contact.create.gender/en
 * Europeana:Formtastic.hints.user.contact.create.locality/en
 * Europeana:Formtastic.hints.user.contact.create.postal code/en
 * Europeana:Formtastic.hints.user.contact.create.region/en
 * Europeana:Formtastic.hints.user.contact.create.street address/en
 * Europeana:Formtastic.hints.user.user.new.password confirmation/en
 * Europeana:Formtastic.hints.user.user.new.terms/en
 * Europeana:Formtastic.hints.user.user.create.password confirmation/en
 * ‎Europeana:Formtastic.hints.user.user.create.terms/en
 * Europeana:Formtastic.hints.options.admin/contributions controller/options.index.fields/en
 * Europeana:Formtastic.labels.attachment.attachment.edit.title/en
 * Europeana:Formtastic.labels.attachment.attachment.new.title/en
 * Europeana:Formtastic.labels.attachment.attachment.update.title/en
 * Europeana:Formtastic.labels.contribution.metadata.date/en
 * Europeana:Formtastic.labels.user.contact.new.age/en
 * Europeana:Formtastic.labels.user.contact.new.country/en
 * Europeana:Formtastic.labels.user.contact.new.full name/en
 * Europeana:Formtastic.labels.user.contact.new.gender/en
 * Europeana:Formtastic.labels.user.contact.new.locality/en
 * Europeana:Formtastic.labels.user.contact.new.postal code/en
 * Europeana:Formtastic.labels.user.contact.new.region/en
 * Europeana:Formtastic.labels.user.contact.new.street address/en
 * Europeana:Formtastic.labels.user.contact.create.age/en
 * Europeana:Formtastic.labels.user.contact.create.country/en
 * Europeana:Formtastic.labels.user.contact.create.full name/en
 * Europeana:Formtastic.labels.user.contact.create.gender/en
 * Europeana:Formtastic.labels.user.contact.create.locality/en
 * Europeana:Formtastic.labels.user.contact.create.postal code/en
 * Europeana:Formtastic.labels.user.contact.create.region/en
 * Europeana:Formtastic.labels.user.contact.create.street address/en
 * Europeana:Formtastic.labels.user.user.new.email/en
 * Europeana:Formtastic.labels.user.user.new.password/en
 * Europeana:Formtastic.labels.user.user.new.password confirmation/en
 * 1) ‎:Europeana:Formtastic.labels.user.user.new.username/en
 * Europeana:Formtastic.labels.user.user.create.email/en
 * Europeana:Formtastic.labels.user.user.create.password/en
 * Europeana:Formtastic.labels.user.user.create.password confirmation/en
 * Europeana:Formtastic.labels.user.user.create.username/en

I will complete this list but there are many more like this