Lang's genre is German folk music; he typically sang in the Bavarian dialect of the rural Alpine regions.

His greatest hit was his 1968 recording of Karl Ganzer's composition "Das Kufsteiner Lied".

Throughout the 1970s, he was a permanent feature of musical variety shows on West German television, especially on the ZDF program Lustige Musikanten.

[2] He was married to his wife Johanna since 1954; he had one son (Franz Herbert Lang, 1966–1995) and one daughter (Christl).

On 11 January 2016 he was buried in Munich Waldfriedhof, a forest cemetery, with multiple dedications from his family and friends.