What If Washington knew French

Before the start of the French and Indian war (a subset of the 7 year's war), George Washington was leading a group of militamen. They came upon a French group and attacked. A frenchman tried to tell him that they were on a diplomatic mission, but George Washington didn't know french and then an Indian chief killed the frenchman. This eventually led to the French and Indian war. What would have happened if Washington knew French and was able to find out that they were on a diplomatic mission and stop the Indian chief from killing the rest of the french?
 
The war would have broken out within a year anyway, would be my prediction. Keep in mind that the reason Washington was there in the first place was to dislodge the French from land both the French and British claimed.

Additionally blood had already been shed; their respective Indian allies were already killing each other over the dispute.
 
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