Were the mohawks the only Indians with a written language?

No, the Mohawks were not the only Indigenous people with a written language. Several Native American tribes developed their own forms of writing or utilized pictographs to convey information and stories. Additionally, the Cherokee, for example, created a syllabary in the early 19th century, enabling them to write in their own language. Other tribes also had systems of record-keeping and communication that could be considered written forms.