ESPERANTO
International League of Esperanto-speaking Teachers / Internacia Ligo de Esperantistaj Instruistoj (ILEI)
Website: https://www.ilei.info/
GERMAN
Der Internationale Deutschlehrerinnen- und Deutschlehrerverband e. V. (IDV)
http://www.idvnetz.org
RUSSIAN
International Association of Teachers of Russian Language and Literature (MAPRYAL)
https://ru.mapryal.org