What language is the who ville Christmas song?

WELCOME CHRISTMAS - The Whoville Christmas Song

Fah who foraze! Dah who doraze!

Welcome Christmas, come this way!

Fah who foraze! Dah who doraze!

Welcome Christmas, Christmas Day!

Welcome, welcome! Fah who rahmus!

Welcome, welcome! Dah who dahmus!

Christmas Day is in our grasp!

So long as we have hands to clasp!

Fah who foraze! Dah who doraze!

Welcome Christmas! Bring your cheer!

Fah who foraze! Dah who doraze!

Welcome all who's far and near!

Fah who foraze! Dah who doraze!

Welcome Christmas, come this way!

Fah who foraze! Dah who doraze!

Welcome Christmas, Christmas Day!

Welcome, Christmas! Fah who rahmus!

Welcome, Christmas! Dah who dahmus!

Christmas Day will always be!

Just as long as we have we!

Fah who foraze! Dah who doraze!

Welcome Christmas! Bring your cheer!

Fah who foraze! Dah who doraze!

Welcome all who's far and near!