Download the ngrams.db file by default
Download the ngrams.db file by default

We need the ngrams.db file in order to have language
autodetection working, so skipping it by default is not
very wise.

Generating the ngrams.db file takes about 4.5GB of RAM and
20 minutes with the current sentences_detailed.csv,
so it’s easier to just download it from tatoeba.org.

Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2,Tatoeba/tatoeba2