AH Challenge: Iberian languages with Arabic alphabet to present day

Your challenge, should you accept it, is to have the Arabic abjad used as the main way to write the Romance languages in the Iberian peninsula (i.e. Castilian, Portuguese, Catalan, etc.), all the way to the present day, with a POD no earlier than the creation of al-Andalus. Note, however, that there need not be just solely Muslim states like al-Andalus for the usage of the Arabic abjad - it also includes the Christian kingdoms as well.

Permission is also granted to allow extra/modified letters in the Arabic alphabet (so long as the letters you are using are found in either the "Basic Arabic" and/or "Arabic Extended" Unicode blocks) - however, I'd like to see an orthography first. In fact, if you DO decide to do orthographies for at least 1-2 Romance languages using the Arabic abjad, you'll get bonus points (and a cookie if you do more than 1-2), under the condition that you post them here.
 
How about if `Umar ibn Hafs ibn Ya`fa-r's revolt was successful in the early 10th century? He succeeds in consolidating his base in Granada, and defeats attempts by the new caliph Abd-ar-Rahman III to retake Granada.

Umar converts to Mozarabic Christianity AIOTL (and thus uses the Arabic script). He allies with Ibn Marwan (a Sufi rebel in Badajoz / southern Portugal). Together they advance north against the emirate. Umar allies with Asturias and Pamplona, proposing they divide up Corodba between them all.

Then in the 920s, the Fatimids launch raids against Cordoba. With the combined pressure of four simultaneous land attacks (Granada from the south, Badajoz from the southwest, Asturias from the north, and Pamplona from the northeast), and Fatimid raids, the Cordoban Emirate collapses and Al-Andalus is divided up. There is a Mozarabic Christian Granada, Muslim Badajoz, and Christian north. Due to butterflies, the Mozarabic rite stays in use in Asturias and Pamplona, and Arabic filters down to be used by the nobility of the northern kingdoms.
 
I think it could be used any POD that makes the Mozarabs much stronger (delayed reconquista coupled with absence of Almohads and Almoravids, and consequent more religious tolerance, along with less success by Muslims in converting Christians but still influencing their culture, some conversions of local Muslims to Christianisty in a peaceful way (using economic incentives, etc), allowing them to keep their culture).
 
I think it could be used any POD that makes the Mozarabs much stronger (delayed reconquista coupled with absence of Almohads and Almoravids, and consequent more religious tolerance, along with less success by Muslims in converting Christians but still influencing their culture, some conversions of local Muslims to Christianisty in a peaceful way (using economic incentives, etc), allowing them to keep their culture).

The POD would have to be in the early 10th century, before the Caliphate of Cordoba was founded. During the 900s was when the population tipped in favor of the Muslims due to massive conversion by the Mozarabs and other Christians. Using my POD would lead to Mozarabic Christianity surviving in the south. I think with successful Reconquista would almost certainly lead to the end of the Mozarabs... so you would need a different POD.
 
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