R & F Coin VF Tone

I just looked up a coin from my bag.
1923 France French 10 Centimes 1923 France French 10 Centimes R & F Coin VF Tone
What does R & F stand for?
What does VF Tone mean?

R F = the letters either side of the central hole [Republique Francaise]
https://en.numista.com/catalogue/pieces321.html

I think I figured out what VF Tone means. Somebody correct me if I am wrong. I am not only a novice when It comes to Numismatic terminology, but I believe I am ignorant of meaning of words in other languages. VF Tone probably means VF Conditions. I would never have associated Tone with condition. Here in the states if I had my car painted and I didn’t like the quality of the job, I would never had told the paint shop I don’t like the “Tone”, he would have said that’s the paint number you choose. If you wanted a light or darker shade you should have said so. I would have to say I don’t like the condition of this paint job. You have paint all over the glass, bumpers etc. Somebody straightens me out! Is “Tone” a Numismatic term, or is it a language difference?

What exactly is coin toning?
Toning is a term that describes the discoloration or light patina that forms on the surface of coins due to oxygen and chemicals in the air acting on the metal. This oxidation can result in a variety and level of toning and also depends on the properties of the metal – silver, gold, copper, nickel, etc.
Toning is a slow and normal process that can take months to years to appear. Should you worry about toning? If you’re storing your coins properly, don’t. Unless a coin is in a vacuum, it’s going to start at some point.
A coin that’s toned is in a normal "stage" of its life. It won’t disintegrate away before your eyes. Even in worst cases, the tone color will normally take centuries to reach its very darkest and usually its least attractive appearance.
In fact, you’ll hear coin collectors use the word toning often to a describe a coin’s natural and appealing discoloration.
We’re all familiar with tarnishing. Tarnish and toning are pretty much synonymous on the scientific scale. However, it’s more typical to hear that a coin is tarnished when describing one that appears discolored in an unnatural, spotted or artificial way.

Thanks