Yandex.Translate

Yandex.Translate () is a web service provided by Yandex, intended for the translation of text or web pages into another language.
The service uses a self-learning statistical machine translation, developed by Yandex. The system constructs the dictionary of single-word translations based on the analysis of millions of translated texts. In order to translate the text, the computer first compares it to a database of words. The computer then compares the text to the base language models, trying to determine the meaning of an expression in the context of the text.
In September 2017, Yandex.Translate switched to a hybrid approach incorporating both statistical machine translation and neural machine translation models.
The translation page first appeared in 2009, utilizing PROMT, and was also built into Yandex Browser itself, to assist in translation for websites.
This service is also built into the Russian Wikipedia to provide translation services from English to Russian.
Supported languages.
Immediately after the launch of the translator in beta mode in the spring of 2010, it was only available in three languages — English, Russian and Ukrainian, with a limit of 10,000 characters.
Yandex.Translate has some languages that are missing from Google Translate, such as Russian national minority languages of Hill Mari. 
As of March 2021, translation is available in 98 languages: 
The translation direction is determined automatically. It is possible to translate words, sentences, or web pages if needed. There is also the option to view both the translation and the original at the same time in a two-window view. In addition to machine translation, there is also an accessible and complete English-Russian and Russian-English dictionary. There is an app for devices based on the iOS software, Windows Phone and Android. You can listen to the pronunciation of the translation and the original text using a text to speech converter built in.
Translations of sentences and words can be stored to a "Favorites" section located below the input field.
Limitations.
Yandex.Translate, like other automatic translation tools, has its limitations. When the online service was first introduced, the head of Yandex.Translate, Alexei Baitin, stated that although machine translation cannot be compared to a literary text, the translations produced by the system can provide a convenient option for understanding the general meaning of the text in a foreign language.
Translation methodology.
According to Arkady Volozh, the mechanism of Translate is as follows:
In addition to the free version for users, there is a commercial API online translator (free up to 10 million characters, then paid), designed primarily for the localization of sites of Internet shops and travel companies.