Free Online Resource for Translation and Studies in the English-Russian Language Pair

Free online dictionary LexSite is developed and managed at Language Interface, a language engineering company that has been providing linguistic support for international projects for more than 20 years.

The first version of this dictionary was built and published online in 2009. Version 5.0 features upgraded software framework and data structures. Its lexical base was considerably reworked and extended.

The decades of experience by the Language Interface team in English-Russian and Russian-English translation enabled the developers to identify specific problems faced by translators when working with this language pair and develop a tool to guide them in selecting words or phrases that offer the best possible fit for a given context.

LexSite continuous improvement involves research in the field of lexicography, cognitive linguistics and data science.


English-Russian and Russian-English dictionary LexSite was developed to improve cross-cultural communications. The dictionary contains more than 1.4 million lexical-semantic units. Its search engine captures morphological specifics of the English and Russian languages thus reducing ambiguities and improving the speed and quality of translations in the English-Russian language pair.

The LexSite development work included the creation of lexicon free from numerous errors frequently found in other tools. This is where LexSite dictionary excels in providing an outstanding quality of information.

In addition to commonly used vocabulary, LexSite contains a unique terminology base. It includes terminology related to science and technology, as well as project-specific terminology used in international projects. These terms were collected by the Language Interface team while working with organizations such as United Nations, Lokheed-Martin, Worley-Parsons, NASA, Orbital, Fluor Daniel, McKinsey, Sberbank, Tengizchevroil, Schlumberger and other global brands.

Learner's Dictionaries LexTutor

The lexical-semantic platform LexSite is equipped with tutoring features that help learning foreign lexis.

Users develop their personal dictionaries adding translations found in LexSite Dictionary or entering their own translations. Personal dictionaries can be edited, converted into Excel format and printed. Besides, the dictionary automatically creates flashcards that contain headwords and all translations user selected for that headword. Users can start flash sessions where the flashcards are shown in a random order.

LexTutor helps efficiently developing learners' vocabulary and self-check the user's knowledge of foreign words and phrases.

Core Team
Mark Kit, Ph.D.
System architecture and design
Dmitry Kit, Ph.D.
Machine learning
Elena Berg, Ph.D., J.D.
Linguistic analysis
Gennady Smirnov
Lexical data processing
Relevant Publications