The language of noises he had developed and used for the earlier Osvaldo Cavandoli's La Linea from 1971 to 1986 was reinterpreted for the acclaimed TV series Pingu on SF DRS during its first four seasons produced between 1990 and 2000, where Bonomi voiced all the characters without a script.

[1][3][4][5] His grammelot was originally intended to be a parody of the Milanese dialect, and it was inspired by three abstract languages traditionally used by clowns in France and Italy.

[6][2][7] When in 2003 the show's rights were acquired by HIT Entertainment, Bonomi was replaced by London-based voice actors David Sant and Marcello Magni.

Bonomi was also very active as a voice actor in Italian radio dramas, and was the Italian voice for several popular cartoon characters, including Mickey Mouse and Fred Flintstone.

Bonomi died on 6 August 2022 in his home town in Milan, Italy, at the age of 85.