How can we use translation on this ?

[WestFarmer]

export class FilterOperator {
  static readonly EQUAL  = new FilterOperator('eq', '等于');
  // ...more

  // private to disallow creating other instances of this type
  private constructor(private readonly key: string, public readonly value: any) {

  }

  toString() {
    return this.key;
  }
}

I want the second argument of FilterOperator constructor, get translated, even switching locale at runtime ?

Is this possible ?