Shafaqna English- Islamic Laws on fasting according to the Fatwas of the Grand Ayatollah Sistani.
Acts that invalidate a fast: Deliberate vomiting
Ruling 1616: Whenever a fasting person intentionally vomits, his/her fast becomes invalid even if vomited out of necessity or because of illness or suchlike. However, if he/she vomits unintentionally or involuntarily, there is no problem [and the fast remains valid].
French
Le jeûne: Le vomissement
Article 570: Si une personne en état de jeûne vomit intentionnellement, son jeûne devient invalide, même s’il l’a fait à cause d’une maladie. Toutefois, si on vomit involontairement ou par erreur, le jeûne ne devient pas invalide.
El Ayuno: Vomitar voluntariamente
Reglas: Si el ayunante hiciera algo que provocara intencionalmente el vómito, su ayuno será inválido, aunque se tratase de un caso defuerza mayor.
The full text of the Islamic Laws according to the Fatwas of the Grand Ayatollah Sistani is available in English here:
https://www.sistani.org/english/book/48/ [1]
In French:
https://www.sistani.org/french/book/55/ [2]
In Spanish: