abilityActivationTypesPlurals: {
    attack: "PF1.Activation.attack.Plural";
    free: "PF1.Activation.free.Plural";
    full: "PF1.Activation.fullRound.Plural";
    hour: "PF1.Activation.hour.Plural";
    immediate: "PF1.Activation.immediate.Plural";
    minute: "PF1.Activation.minute.Plural";
    move: "PF1.Activation.move.Plural";
    round: "PF1.Activation.round.Plural";
    standard: "PF1.Activation.standard.Plural";
    swift: "PF1.Activation.swift.Plural";
} = ...

This describes plurals for activation types.