non-return inlet-valve of the bellows

Clack - English

Clapet - French

Copek - Polish (Silesian)

Inlet valve - English

Klapka - Czech

Lap - Croatian

Souspappe - French (hist,)

Ventil - German

Ventl - German* (Czechia)

Vzduchojem - Czech

·? (bellows: inlet valve [Term not mentioned in available sources]) - Spanish (Castilian)