This page will contain a list of features of Boeotian Greek. I'm not a linguist, just a snerd. My source is Introduction to the study of the Greek dialects; grammar, selected inscriptions, glossary by Buck. The abbreviation "c." means "corresponds to". I could just use an equals sign...
- "ο from α before or after liquids."
- ε became close before a vowel, and was variously spelled ει, ι, or ε. ex.: A. θεός c. B. θιός, θειός.
- "Boeotian ε in general had a relatively close sound, and the spelling ει occurs occasionally even before a consonant".
- η was so close that it was spelled ει.