SlidesPro is a Chrome Extension that automagically helps you communicate more effectively to your audience when presenting Google Slides. The free features allow you to export the first page of the captions as a PDF. You can export the captions to a PDF or Google Doc, including the slide navigation. Additionally, you can translate your speech to text in real time with a Power license.
Slides Translator is a Google Slides Add-on that can translate from one language to another. It will automatically detect the language of the selected text and provide a translation in the selected language.