Curved text: how to allow only one side of a path?

Question

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Illustration for the situation .
It is necessary to make editable text located along a curve. And I did, but the problem is that it is both on the inside and on the outside of the path (why, by the way?) With a large symbol size, and on the inside - with a small one, and my task is to have it only on the outside.
How can this be implemented?