Three times a week, they e-mail a snappy digest of American news called Washington ProFile to more than 20,000 Russian-language subscribers in more than 100 countries -- and to a like number once a week in Chinese.
And while the majority of users now subscribe to the English-language updates, there's still a core group of Spanish-language subscribers, many of whom may be undocumented.
"Subscribers will help keep language education free for millions of people around the world," von Ahn writes in this week's announcement.
Discovery has channels in 217 countries and territories in 45 languages as well as 1.3 billion subscribers outside the United States.
That English-language Developer Channel has more than 650,000 subscribers.
Regular software releases containing the improvements of the last upscaling cycle may be used by paying subscribers to satisfy their natural language processing needs, resulting in solid long-term funding.
Four years on, the Spanish-language vlogging channel has nearly 1.6 million subscribers, with Luzu now running two others.
If those viewers look for "Dexter" on Showtime, which unlike CBS is a pay service with just 16 million subscribers, they will find considerably stronger language but not much more blood.
In Miami, where AT&T had 600,000 subscribers, Comcast has added more Spanish-language channels and is spending more money marketing to Hispanic households than AT&T did.
The English-language version launched last May already counts some 20K subscribers that take advantage of the insider deals when traveling in these selected French cities.
Of the 213 emails sent out by subscribers so far, only five have been in a language other than English.
