Poloniex is an American crypto exchange, once one of the most popular exchanges on the market, which was consistently in the top 5 by all criteria, and is now steadily losing its clients due to increased competition. At the first glance at the site, we see a pleasant and informative design, even without special knowledge of the English language, you can calmly figure it out, oh yes, the site has not been translated into languages other than English. Recently, mobile applications for iOS and Android have been available, and unlike the main site, they are translated into 9 languages.