Google assistant entity_config names without underscore?

I’m setting up Google Assistant to respond to voice commands to control some HA devices. I have expose_by_default as false, and I’m individually adding certain devices using entity_config. My question is, can the name and aliases values be strings with spaces, rather than using underscores? The instructions show “CUSTOM_NAME_FOR_GOOGLE_ASSISTANT” in the example, but that format is causing Google to say the word “underscore” as part of the name.