>I always wondered how "inshallah" became "ojalá". The 'j' sound in 'ojala' is the same as in 'pájaro' which in Ladino-as the article points out--is "pasharo" thus supplying the explanation.

You might enjoy, as I did, this explanation of why X is the unknown quantity in Algebra: another case where "sh" got marked as 'x' which is pronounced the same as 'j'. https://www.ted.com/talks/terry_moore_why_is_x_the_unknown

It's a bit of a just-so-story without much in the way of evidence though though, so there's a rebuttal here https://gizmodo.com/why-we-use-x-as-the-unknown-in-math-1657...