YA Historical Fiction: FMC speaks multiple languages and is some sort of spy

[Shoshana]

I wish I remembered more details, and I may be mixing up two different books, but here’s what I recall:

The female protagonist is very intelligent and speaks a bunch of languages, including Hebrew that a rabbi taught her (I remember this because at that time Hebrew was a dead language so I thought it was weird). I’m 90% she lives in England. She’s part of the landed gentry or nobility. She sneaks out to investigate a mystery or she’s some sort of spy? Maybe an amateur one, I don’t recall

Now, here’s where my memory goes super fuzzy and where I might be mixing books up. There is a male love interest, and I seem to remember that he’s an artist (he was hired to paint her portrait or something like that). He had some sort of unusual blue paint and really he was from a high class family but no one knew. I might be crazy but I remember this detail so out of context. If this is a thing but just in a different book, please let me know

[Becca]

The heroine of Wrapped by Jennifer Bradbury speaks several languages, including Hebrew learned from a rabbi:

"I do so hope that my Greek proves adequate. I’ve had no practice speaking,” I told him. While I was confident in my reading and writing abilities, having taught myself after exhausting my language tutors in German, Italian, French, and Spanish and that kindly old rabbi Father unearthed to help me with Hebrew, there had been no suitable tutors for Greek or Hindi, and my progress suffered for it.

(Quote from Google Books Preview - https://www.google.co.uk/books/editio...)

Roughly what year / decade do you think you read this? Wrapped was publushed in 2011 so it would be good to know if that's too late, e.g. if you're looking for something you read in the 80s or 90s.

There doesn't seem to be an artist in this book, but the unusual blue paint you mention might be lapis lazuli (a rare and expensive blue pigment), in case that helps with your search.