When the Arab conquered the Sindh region in about early 700 ADs and moved more towards the east they started eliminating learned Sindhi scholars and Holy men, who enjoyed rich merchant heritage and were established in the region. With passage of time, “Urdu” language was forced in the region and subsequently became an official language and in current times known as Sindhi language (Descendent language of Landa script) which is currently written in Urdu script. 
In early 15th century Khojki language was used by many to write prayer hyms and guidance songs. The extended use of this script and the underlining Landa script also indicate that the author didn’t revise his book into the periods urdu language but made it’s knowledge more hidden by superimposing Khwaja Khoji Vowel marks on top of Brahmi languages ( K, Ki, Ku,Kuu, Kay, Kaay, Ku,  Kho, KHU, KHUU  Gutturals. Brahmi language is considered as the main language based on which current northern India languages are based on. It itself is part of Indo-European set of language whose base is Sanskrit in general. This timeline spans 1000’s of years from the period of Harappa and Mohenjo-Daro.

Voynich Manuscript is written in Landa Khojki Scripts and belongs to Sindh regions Merchant​ -                          Sukhwant Singh