Allan Wenger is a bilingual actor who has worked extensively in both English and French voice productions since the 1980s. His career encompasses voice acting for animated series, films, and video games, as well as on-screen acting roles in live-action cinema.

Wenger's voice acting work includes a range of characters in English-language adaptations of Japanese anime and other animated features. One of his notable early roles in anime was as the voice of John "Sleepy" Estes, the trigger-happy and brutal police officer known as "Mad Bull," in the English dub of the four-part original video animation series Mad Bull 34, which was released in the early 1990s. He also provided the voice for the character Terada in the English version of the 1991 animated film老人Z. In a significant departure from action-oriented roles, Wenger voiced Otto Frank, the father of Anne Frank, in the 1995 Japanese anime film The Diary of Anne Frank, a role that placed him in a historically grounded and dramatic narrative.

Beyond these specific credits, Wenger's voice can be heard in a variety of other projects. He voiced characters in English dubs of films such as Persepolis in 2007 and A Monster in Paris in 2011. He also contributed to the English versions of video games, providing the voice for the Teensie Kings in Rayman 2: The Great Escape, as well as voices for characters in the Asterix and Obelix video game series and the Dracula: Resurrection adventure games. He also voiced the roles of Mr. Delmas and Waldo Schaeffer in the English adaptation of the French animated series Code Lyoko, for which he also served as the casting director.

Throughout his career in voice acting, Wenger has frequently collaborated with a recurring ensemble of voice actors based in France, including Barbara Weber-Scaff, David Gasman, Jodi Forrest, and Sharon Mann. This group has often provided English voices for various animated productions and video games recorded in Paris.