G. Friedrich Neuhauser, 84, a retired language expert with the FBI, died of cancer Sunday at his home in Chevy Chase, Md.

Mr. Neuhauser was born in Doebeln, Germany, in what is now East Germany. During World War I, he was an officer in the German Army and sae combat on both the Western and Eastern fronts.

In the early 1920s, he came to the United States as the legal representative for the Julius Schubert Music Publishing Co. Having decided to remain in this country, he joined the Army and served for five years in Texas.

After leaving the Army in 1930, he became an assistant editor at the Texas Free Press in San Antonio. A year leater, he was promoted to editor and president of the newspaper.

During World War Ii, Mr. Neuhauser did some work for the old Office of War Information. Among other things, he gave an address in his native language that was broadcast to Germany at the time of the Normandy invasion.

In 1945, Mr. Neuhauser left the Texas Free Press and moved to the Washington area. He joined the FBI as a security specialist, later becoming a language expert for the bureau. He retired in 1966.

Survivors include his wife, Edna Earl Neuhauser, whom he married in 1935, of Chevy Chase, and a daughter, Mary 'elen Canuto, also of Chevy Chase.

The family suggest that expressions of sympathy be in the form of contributions to the Montgomery Hospice Society, 6701 Wisconsin Ave., Chevy Chase, Md. 20815.