You don’t tell us enough to understand what you have tried or what the issue is? Which CMS style do you need? The Author Date one or the footnote one? You can get these by gong to the help menu and selecting Endnote Output Styles in the desktop program, and typing in “chicago” in the first field.
| Chicago Manual of Style 17th edition Footnote | Footnote | Humanities | 2018-11-28 | Download |
| Chicago Manual of Style 17th edition Author-Date | Author-Year-Cited Pages | Humanities | 2018-11-13 | Download |
Both have a field for translator in the bibliography template for books.
I assume you have downloaded the CMS output style you require and selected it in your manuscript?
Often the problem is how you entered the authors into your library. They must be one per line, best surname, first names or initials separated by spaces.
give us more info, and we other users, can try to steer you in the right direction.