Thank you Charles,

this might be a lead, however, in my case, and as my message says, the sequence etn comes at the end of some words. Fortunately, if I often type etn for ent, the rest of the word is generally correct, and I only want to replace the end of the word: mometn -> moment for instance. There is thousands of words ending with ent in French and I would like to avoid enter all these words in the Autocorrect list.

It would be smarter to use some wildcard

I tried *etn, but it only recognizes this exact string, treating the star as a normal character.

Any clue?