Green’s Dictionary of Slang

be quiet! shut up!

1892		Nat. Advocate (Bathurst, NSW) 3 Dec. 2/4: LANGWIDGE! A summons has just been issued against Bathurst resident for having let out a torent of ‘langwidge,’ which, according to the information, would raise the hair of a Yankee second mate.
1934		J. Franklyn This Gutter Life 283: ‘Come on now, or I’ll climb that grid and wipe the bloody floor with you!’ ‘Language – if you please, miss.’.
1952		C. Harris Death of a Barrow Boy 143: ‘I don’t grumble. I enjoy life. Only this ain’t a bleeding life, it’s a ---’ ‘Language!’ She moved off, ‘Language!’.
1963		B. Naughton Alfie II iv: alfie: Don’t be so bleedin’ fussy. ruby: Language!
1978		W. Donaldson Balloons in Black Bag 26: ‘It’s a fucking outrage!’ ‘Language, Charlie!’ said Emma Jane sharply.
1982		P. Barker Union Street 8: ‘Language!’ said Mrs Brown, automatically.
1991		R. Doyle Van (1998) 367: Fuck off, yourself. The state o’ yeh. You’d get drunk on a barman’s fart. – Fuck off. – Language, lads.
2012		J. Cox Cradle of Thorns [ebook] ‘Crikey! That bloody hurt!’ ‘Language, if you don't mind!’.
2021		C. Hammer Opal Country 80: ‘Jeez,’ says Ivan. [...] The priest frowns. ‘Language, please. This is a house of God’.