So far we only have one sample of life to go by, but using that as a guideline, it looks like the most common kind would be bugs and insects, then plants and a small percentage of vertebrates.
Anyone so limited that they can only spell a word one way is severely handicapped!
Look at the life forms in our sample over the history of the earth. What percentage of the life forms have used technology during what percentage of the existence of life on the earth?
Anyone so limited that they can only spell a word one way is severely handicapped!