Duxbury DBT contains a braille translator for text written in the Amharmic language.
Duxbury DBT contains a braille translator for text written in the Tigrinya language.
Duxbury DBT contains a braille translator for text written in the Oromo language.
Duxbury DBT version 12.7 contains a braille translator called West African languages for text written in hundreds of languages throughout Africa. Use this translator for the other languages of Ethiopia.
Here is a short 5 page description of this braille system, translated into 30 different languages. Here is the page in the pdf for Amharic.
Many language are supported by Google Translate. Use this link to see what the Duxbury DBT Help System looks like in your choice of languages: Duxbury DBT allows you to translate the DBT Help file into dozens of other languages.