In ezsurvey 2.1.1:

The following extension/ezsurvey/modules/survey/classes/ are not 18n filtered:

• Email Entry
• Number Entry
• Paragraph
• Form Receiver
• Related object
• Section Header
• Text Entry

Additionally there are some 18n unfiltered texts in extension/ezsurvey/design/standard/templates/survey/ templates

• 'Add existing' and 'Remove' in edit/relatedobject.tpl
• 'All evaluations' in result.tpl
• 'Summary' and 'All evaluations' in result_list.tpl

Steps to reproduce

The translated names of survey class names (and some template texts) are displayed always in english.