Get the file, convert, export, import in sql … basically do what you need to
Here it is a present for you all guys and for my future self, a list in csv of the most spoken language, ready to be integrated in your software.
If you need more details about languages, take a look to this website I bumped into: Glottolog.org. It is a beautiful project, which expose interesting information about languages, take a look at it if you wish.