On Android if you tap Camera, you can tap an Instant button to immediately translate whatever words show up on the screen.
Incidentally, in Camera mode on the iPhone, the Google Translate name changes to Google Lens, a feature within the broader Google app. You can also snap a picture and select the words you want to translate. On the iPhone if you tap Camera inside Google Translate, recognized text in the original language is overwritten by the app. This can be handy not only while traveling, but also if a loved one, friend or someone you've hired is more comfortable speaking in their native language, but you're not fluent. While in this mode, you can also tap a Both button on the iPhone or an Auto button on Android to have the phone listen for both languages.
When you tap Conversation, two people can speak in turn, each by pressing a microphone button and watching words appear in both languages.
