Ask HN: Where does this mate translate language app get its dataset from?

https://gikken.co/mate-translate/

They have 100+ languages. The user can pick a word, say "Morning" and find it in all 100 plus languages. They also have pronunciation, phrases etc. I checked a few translations and pronunciations in some languages I know, they seem accurate and manual.

Are there free dictionaries, datasets, pronunciations they are using? Or did they hire hundreds of people to compile this dataset?