most difficult languages to learn in the world

For centuries, the Indonesian language has been the lingua franca of the entire Indonesian archipelago. Its considered one of the most widely spoken languages in the world because Indonesia is the fourth most highly populated country in the world.

The Persian language belongs to the IndoIranian branch of IndoEuropean languages and is mainly spoken in Afghanistan and Iran, as well as Tajikistan and other countries with Persian influence. This language is known to be a continuation of the literary language of Sassanid Persia called Middle Persian language and around 110 million people speak the language worldwide.

This North Germanic language is the national language of Norway. Norwegian, together with Swedish and Danish, is mutually intelligible with other variants of Scandinavian languages like the Icelandic and Faroese languages. Its also one of the working languages of the Nordic Council.

Navajo is one of the Southern Athabaskan languages that are spoken in the southwestern part of the United States and has about 120,000 to 170,000 speakers

An Austronesian language, Tagalog is the language spoken by almost a quarter of the total population of the Philippines.