The expression "Pin ni pan" in Bambara and Maninka

With the expression pínní pán' it seems that we have a similar case where words featuring the expressive element of /p/ are used idiomatically to refer to denotationally unspecified actions associated with effort. The closest parallel that comes to mind in English is an expression like "blah-blah-blah" though it isn't grammaticalized in the same way or to the same extent.

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