Is there any difference between "spoken" and "vocal" language?

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What is the rationale for keeping the spoken language article separate from the vocal language article? Is there any distinction between these two terms? Jarble (talk) 16:13, 12 May 2013 (UTC)Reply

Also, is there any distinction between speech and vocal language, or are they completely synonymous? Jarble (talk) 16:18, 12 May 2013 (UTC)Reply