Using the Dictionary Plugin with other languages is easy.
On the Dictionary Plugin Settings page (under the Dictionary admin menu), go to the Reading section.
Settings to Edit
- Origin title
- Related entries title
You can edit these titles to say anything you want — these are the only two sections that display on the front-end of your website. If you update these to the language you are creating your Dictionary in, that is all that you need to translate for your users to see.