Translatable content in the Index Entry:
When is a variant of the template created?
A variant of the Index template is created if there is any text typed in the translatable fields in the template.
Note: it is not good practice to add translatable text to the Index Entry object. Index Entries should be unique and should use translatable text fields from the object.
When is a variant of the object created?
A variant of the Index object is created if there is any text typed in the translatable fields in the object. That is, the content in the field is not inherited from the template.
Object: Use the Index Entry object; each entry should be unique and should not inherit text content from the template.