"Publication Request", "Preview page", and several notification messages are hardcoded in bootstrap: /magnolia-module-workflow/src/main/resources/mgnl-bootstrap/workflow/config.modules.pages.messageViews.xml
(The translations appear to be present.)

Remove keys from bootstrap and add MVH to remove them from configuration.
Keys already exist in language files.

/modules/pages/messageViews/publish/actionbar/sections/workflowActions/label
Publication Request
/modules/pages/messageViews/publish/actions/review/label
Preview page
/modules/pages/messageViews/publish/actions/diff/label
Show Changes
/modules/pages/messageViews/publish/form/tabs/message/fields/message/label
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