The Friday khutbah is a condition (shart) for the validity of the Friday prayer. As such, the Friday prayer is not complete without it, Mufti Taqi Usmani gives the arguments that the Friday Khutbah must be delivered in Arabic as has been done by the Sahaba and Pious predecessors (Salaf) and that as it is an act of Worship (Ibada) so leaves no room for use of Logic.
Mufti Taqi Usmani of Pakistan is one of the leading Islamic scholars living today. Author of more than 40 books, he is an expert in the fields of Islamic law, Economics and Hadith. For over 35 years, he has been teaching at the Darul-Ulum in Karachi (see image in slideshow above) that was established by his father Mufti Muhammad Shafi, the late Grand Mufti of Pakistan. He also holds a degree in law and has sat as Judge at the Shari’ah Appellate Bench of the Supreme Court of Pakistan. He is a consultant to some international Islamic financial institutions and has played a key part in the move toward interest free banking and the establishment of Islamic financial institutions. He is the deputy chairman of the Jeddah based Islamic Fiqh Council of the Organization of Islamic Conference (OIC).
The pdf file has examples of two Khutba’s in Arabic at the end.