A. Create a full set of training data in English, test the model in all three languages, and then incrementally add unique training data in the other skills until you get the quality or intent resolution that you are aiming for.

B. Create a full set of training data in English without adding any training data in the other languages.

C. Create a full set of training data in English and then have that training data translated into the other two languages and add it to the skill as well.

D. Create a full set of training data in each language, where the utterances for each language are provided by native speakers of that language.