<prompt> Translate the following text to SwahiliIs that not so, amigo? His speech was oddly formal, as if he were using a language other than his own, but there was a warmth to the tone which matched that sudden and surprising smile.  <response>: Je, si hivyo, amigo? hotuba yake ilikuwa ya kawaida, kama kwamba alikuwa kutumia lugha nyingine kuliko yake mwenyewe, lakini kulikuwa na joto kwa sauti ambayo mechi kwamba ghafla na kushangaza tabasamu. 