For some expats, life in Riyadh, Saudi Arabia's capital, can be a bit of a cultural shock. While the standard of living is excellent, several characteristics differ significantly from those found in other countries of the globe. Gender disparity will be a part of your daily routine, and you'll spend most of your time in your 'compound' with other expats.
Saudi Arabian schools only teach in Arabic and do not accept non-citizens. As a result, an international school could be the only viable alternative for your child's education in Riyadh.
You’ll find the list of top international schools in Riyadh and their fees:
https://www.international-schools-database.com/in/riyadh/top-schools-in-riyadh
Do they offer Arabic courses in international schools?