Android Q is Android 10
"First, we’re changing the way we name our releases. Our engineering team has always used internal code names for each version, based off of tasty treats, or desserts, in alphabetical order. This naming tradition has become a fun part of the release each year externally, too. But we’ve heard feedback over the years that the names weren’t always understood by everyone in the global community.
For example, L and R are not distinguishable when spoken in some languages. So when some people heard us say Android Lollipop out loud, it wasn’t intuitively clear that it referred to the version after KitKat. It’s even harder for new Android users, who are unfamiliar with the naming convention, to understand if their phone is running the latest version. We also know that pies are not a dessert in some places, and that marshmallows, while delicious, are not a popular treat in many parts of the world."
Read more: A pop of color and more: updates to Android’s brand