Vietnamese - listed as available but can't find it onPlay

According to the list of languages here https://www.dexilog.com/smartkeyboard/en/features/ Vietnamese is available. However I can’t find it on google play. Can anyone help?

No (*) next to Vietnamese: Tiếng Việt means:

Thank you - I feel very silly now.

It’s so long since I first installed Smart Keyboard that I had forgotten the language add-ons were just dictionaries.

Many thanks!

Q. Vietnamese listed as available but can’t find it on Google Play.
A. It’s in Vietnam. You should be able to find it on Google Maps.