- Croaton
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- Exalted Legendary Member
Posted by: JohanStrauss
The flood absorbed Captain Keyes on the Halo orbiting Threshold. That was when the flood learned to speak English, since the flood share a colective mind and share all information from absorbed hosts. As for the Covenant, they had been studying humanity for quite a time. When the Covenant attacked a UNSC frigate 32 years ago, the Covies sent them a warning in English.
This makes the most sense. I stand by this one.