I attached an overview on how to reach the letters of the Ethiopian Geez using the phonetic input for Amharic. To activate that mode, for example in GNOME Editor, use right-click -> Input Methods -> Amharic).
Improvements are welcome.
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Äthiopien, Linux und der ganze Rest
Thanks for sharing this – I’ll find it useful – well, once I learn a little more Amharic & Tigrinya!)