cra-template-rb/template/src/locales/types.ts

The official React Boilerplate template for Create React App

export type ConvertedToObjectType<T> = {
  [P in keyof T]: T[P] extends string ? string : ConvertedToObjectType<T[P]>;
};

/**
 
If you don't want non-existing keys to throw ts error you can simply do(also keeping the intellisense)

export type ConvertedToObjectType<T> = {
  [P in keyof T]: T[P] extends string ? string : ConvertedToObjectType<T[P]>;
} & {
  [P: string]: any;
};

*/

// Selecting the json file that our intellisense would pick from
export type TranslationJsonType = typeof import('./en/translation.json');