June 5 (Reuters) – Language learning app Duolingo (DUOL.O), opens new tab has deleted references in Russia to what Moscow calls “non-traditional sexual relations” after being warned by Russia’s communications regulator about publishing LGBT content classed as “extremism”. Russia last year widened restrictions on the promotion of what it calls LGBT propaganda amid a broader crackdown on LGBT rights, which President Vladimir Putin has sought to portray as evidence of moral decay in Western countries. Roskomnadzor, Russia’s communications regulator, had written to Duolingo, warning it against publishing material promoting non-traditional sexual relations and LGBT propaganda.