At GA, we will be changing the Greeting topic to have only a handful of trigger phrases (5 or less), but you won't be able to add/change them since these are system topics.
You can still change the dialog tree itself (the content of the topic). Does that help?
@ggupta any update on when it will support other languages? Also, will it be possible to have the bot support multiple languages, and switch between them (e.g., asking the user in which language they want to use the bot, and maybe adding language detection to do that)?
@Oliver_Hagvall there is a way to achieve your goal.
1. Create a new topic, such as "my greeting", add your own triggering phrases. Add your messages in this topic.
2. Update the system topic "greeting", delete all the existing nodes. add a step to go to your "my greeting" topic.
Check out the announcement of Power Platform content at Microsoft Ignite!
Join us for an in-depth look at the new Power Virtual Agents innovations at the free Microsoft Business Applications Launch Event.