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To add to the other comments, when I went up Toubkal in May it was below 0°C. That's 4000m though. I would take something with sleeves for sure.
What's the likelihood of finding non-meat food options outside the touristy places?
Very possible but depends how strict you are. I ended up eating a few things that I thought would be veggie but turned out to have some meat in.
Not everyone speaks French. I think only relatively wealthy people learn it. Maybe look up at least how to say "no meat" in Arabic and/or Amazigh
Pro tip from hippy with perfect timing:
https://www.lfgss.com/comments/17589303/