It's a challenge because at times you need to accept a terminology that you do not find welcome from the language perspective. All these languages are regarding the Persian language, that is the official language of Iran. Indeed, it is one of the mysteries of our world and it is only recently that linguists began to understand some of the basic tenets of how it evolves. This way is even better because it enables you to concentrate exclusively on the language, without the distraction of different subjects. In various parts of the globe, there are various languages.