شــــازده كوچـولـو / Шоҳзода Кучулу / Syahzada Kujulu — in Tajik. Tajik / Tajiki / забо́ни тоҷикӣ́ is the official language of Tajikistan. This language has diverged from Persian as spoken in Afghanistan and Iran due to political borders, geographical isolation, the standardisation process, and the influence of Russian and neighbouring Turkic languages. The standard language is based on the northwestern dialects of Tajik, which have been somewhat influenced by the neighbouring Uzbek language as a result of geographical proximity. Tajik also retains numerous archaic elements in its vocabulary, pronunciation, and grammar that have been lost elsewhere in the Persophone world, in part due to its relative isolation in the mountains of Central Asia.