The present invention relates to techniques for translating documents characteristic for a specific field of knowledge from a source language in a target language. Elements causing translation errors in exemplary documents translated by a machine translator (e.g., Internet-based translator, etc.) are used to compile databases of such elements or untranslatable symbols thereof and their equivalent constructs in the source and target languages. Then, using the databases, the elements causing translation errors are substituted in the being translated documents with the corresponding equivalent constructs.