spell
Spells out content character by character with French pronunciation.
Each character is resolved via FrenchCharMap to its spoken French name (e.g. 'é' → "é accent aigu", '@' → "arobase"). Plain letters (a-z) and digits (0-9) are handled natively by the TTS engine via <say-as interpret-as="characters">.
Spaces insert a double pause, newlines/tabs a triple pause.
Parameters
content
The text to spell out (e.g. "AB-12", "mot@test.fr").
pause
Pause between each character in milliseconds (default: 150).