She left Switzerland for Moscow in the winter of 1899.
She worked as a teacher there.
She subsequently married a Russian Nicolas Frenkel and settled in Odessa; the couple had two children.
At the start of World War I, the family moved to Kiev.
During the October Revolution, she worked with the Bolshevik party without actually becoming a member.
She joined the French Communist Group in Moscow and worked as a translator for the Communist International.
She also was personal secretary for Angelica Balabanoff.In the early 1920s, she was sent to France.
She became a leader of the Seine Federation of the French Communist Party, serving until she was removed by Joseph Stalin in 1926.
She remained head of the Women's Commission.From 1946 to 1958, she was senator for the Seine department.
She did not run for reelection in 1958.In 1967, she was awarded the Order of the Red Banner by the Soviet government.Girault died in Paris at the age of 91.