Neuenschwander was born in
Boncourt on 3 November 1926 and attended a cantonal school in
Porrentruy before turning to journalism and poetry. After a stay in
Cambridge, she studied theatre at the in
Geneva. On 27 May 1953, she attended the annual congress of the cultural organization
Connaître, where she met her future husband, . The couple would marry in 1955. In 1961, Pierre and Mousse Boulanger started a program on Bulgarian literature in the series
Poésie universelle. The two were then invited to the embassy in Bulgaria and made their debut on stage. They would return to Bulgaria ten more times. From 1971 to 1974, they toured with José Azpiazu and his daughter, Lupe. The four of them would present a show in
Romandy and France. In 1975, Boulanger recorded an album titled
Berceuse pour une maman, for which she wrote texts in French. In August 1973, Pierre and Mousse presented ''Marchands d'images
at the Festival de Rochessauve, created by Paul Vincensini and Marcel Maréchal. That year, they presented Poésie dans les quartiers'' at the Centre dramatique national in
Lyon in affiliation with the
Ministry of National Education and
Pierre Emmanuel of the
Académie Française. At the
Festival d'Avignon in 1974, they presented two poetry shows:
Poésie pour tous and
Théâtre des poèmes. Through their various shows and presentations, they would become ambassadors of French-speaking culture abroad. Boulanger's husband, Pierre, died on 28 October 1978 at the age of 50 after contracting a disease in Africa. The year prior, she co-founded the
Association des Amis de Gustave Roud alongside her husband, as well as
Jeanlouis Cornuz and . After her husband's death, she occasionally served on the literary jury of the ''Société jurassienne d'émulation''. Boulanger died in
Payerne on 16 January 2023, at the age of 96. ==Awards==