Complex sentence: By this time the Greek language, once so pivotal for translation in Ethiopian literature, had become marginalized and mixed with Coptic and Arabic translations, contributing to a process where medieval Ethiopian historians created a new historiographic tradition largely divorced from the ancient Aksumite textual corpus.
Split into simpler sentences: By this time the Greek language, once so pivotal for translation in Ethiopian literature, had become marginalized and mixed with Coptic and Arabic translations. This contributed to a process where medieval Ethiopian historians created a new historiographic tradition largely divorced from the ancient Aksumite textual corpus.