export declare class Interpolator {
    protected static KEY: string;
    protected normalizer: Interpolator.Normalizer;
    protected clearMissing: boolean;
    constructor(options?: Interpolator.Options);
    protected normalize(key: string): string[];
    protected pattern(): RegExp;
    pluralize(template: string, choice: number): string;
    interpolate(template: string, params: Record<string, any>): string;
    getVariables(template: string): string[];
    protected static checkRule(rule: string, choice: number): boolean;
    protected static escapeRegExp(string: string): string;
}
export declare namespace Interpolator {
    type Normalizer = (key: string) => string | string[];
    type Options = {
        normalizer?: Normalizer;
        clearMissing?: boolean;
    };
}