This can be done quite quickly. You need to finish a game in two different languages. If you do one game, then the app/your device crashes, you'll need to play that first game again.
As for the actual achievement just play one game in your main language, then switch languages in the options screen (slide to the right twice from the home screen). After switching you need to complete another game, this time in your new language. It doesn't matter how well you do, just that you finish.
You can do this with any two languages. I did English and Spanish.
Just play your two games and it will unlock.
Thanks to Billy Horrible
for confirming that you don't need to play a full game and that it will still unlock if you only join half way.https://www.trueachievements.com/DracoKall.htm
says that it does not have to be done in one sitting.
If it refuses to unlock for you, Jonas512
advises that you should try playing in 2 new languages that you have never played a wordament game before in, on any platform.