Training corpus of LASER?

[ever4244]

Good Morning!
Would you release the script/link on how to get the training corpus of LASER?
Since it is a corpus combination, some corpus is cut from the original corpus. It is very difficult to replicate the original training corpus of LASER.

So I want to ask for a script/detailed guide to cut, combine, and process all the original corpus as the LASER does. If there a readily available corpus combination then it would be more wonderful. I actually just want a make a subset of LASER training corpus containing 'en, es, fr, de, it.'
Regards!
Wei