oro:
    email:
        contexts.tooltip: Choose an entity to link with email
        emailtemplate:
            entity_name.tooltip:  Choose an entity this template is related to or keep it empty if this template is not related to any entity.

oro:
    email:
        contexts.tooltip: Context is any record or records that have meaningful relation to an email conversation. When you add context of a record to the email conversation, it will be displayed in the Activity list of that record.
        emailtemplate:
            entity_name.tooltip:  Choose an entity this template is related to or keep it empty if this template is not related to any entity.

Change context info tooltip on email form
CRM-3165: Change context info tooltip on email form
