1. Corpus of Parallel Russian and Bulgarian Texts. http://rbcorpus.com
2. Inkluz. https://ws.clarin-pl.eu/inkluz.shtml
3. InterCorp. https://intercorp.korpus.cz
4. KonText. https://kontext.clarin-pl.eu
5. Polish-Russian Parallel Corpus. http://www.pol-ros.polon.uw.edu.pl