Benjamin W., Joaquim Brandao de Carvalho, Aleksas Girdenis, Rick MacAllister, Chris Miller, keith Goeringer, Daniel E. Collins, Joey Laubach II, Sean Jensen, Tim Beasly, Jose Luis Estevez, Miguel Carrasquer, Paul Boersma, Curt F. Woolh, Johnny Thomsen, C. Whiteley. It would be worthwhile investigating the historical evolution of latin velar stops before front vowels in the modern langges. Much work has been done on these issues with respect to Russian and Polish, for example. Mandarin, or Putonghua, is the national language of China.
Some dialects possess only one or the other.