Herbert Hoover and his wife Lou Henry Hoover often had public conversations in which language so that people could not eavesdrop on them?
Mandarin chinese Mandarin dialect Mandarin (language) Chinese Mandarin Guanhua Chinese Chinese, Mandarin Mandarin dialects Mandarin Chinese Pei-fang-hua ISO 639:cmn Mandarin Language Dialect of Mandarin Chinese, Mandarin language 北方話 Dialects of Mandarin Chinese Mandarin Chinese Mandarin (linguistics) Mandarin language Mandarin variations Mandarin vs Other Mandarin language varieties 北方话 Northern Chinese Beifanghua Guan Chinese Mandarin Chinese language Beifangfangyan
chinese mandarin chinese mandarin vs other mandarin dialect beifanghua mandarin dialects mandarin linguistics 北方话 mandarin variations mandarin language varieties mandarin chinese language mandarin language chinese mandarin language chinese mandarin dialects of mandarin guan chinese dialect of mandarin beifangfangyan guanhua chinese pei fang hua iso 639 cmn 北方話 mandarin chinese northern chinese
mandarin chinese
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Mandarin Chinese