The show writers worked with members of the Mohawk Nation and Disney's diversity department, which brought in consultants from the Smithsonian Institution, to ensure cultural accuracy for the portrayal of Indigenous Americans when creating the story, characters, setting, design and music.
What caused the change: Surtur caused Ragnarok early and resulted in the Tesseract landing in the Mohawk territory lake, creating a portal to another world and bestowing powers like Captain Marvel.
Except for Strange Supreme and The Watcher, no one speaks English.