The French alphabet has 5 diacritics and 2 orthographic ligatures, to make 16 extra letters. In Latin scripts, letters with diacritics like ä, å or à, ñ, ö, and ü can be transcribed as ae, aa, gn, oe, and ue.
However, in telegraphy, there are no codes for Ââ, Êê, Ëë, Îî, Ïï, Ôô, Ùù, Ûû, Ÿÿ in Continental Morse. In Telex, all letters with diacritics including Çç, Èè are totally gone but in European variant of original Baudot code where only Éé existed.
Can modern French do without diacritic, or only with Éé at most, in telecommunication especially?