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I suppose that when you enter "French" accent acute sign you effectively replace a regular letter with the corresponding accented one. The set of accented letters is very limited. With Russian...

Макрос не нужен. Вставка -> символ, и там есть кнопка "назначить сочетание клавиш".

There is the unicode symbol "combining acute accent" that serves for exactly that purpose. If you use Word you have to type 0301 after the stressed vowel and press Alt-X.
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