Complex sentence: In the 1850s, the Standard Alphabet, universal to all languages, was published by C.R. Lepsius and became the first Igbo orthography, containing 34 letters and digraphs and diacritical marks to transcribe sounds distinct to African languages.
Split into simpler sentences: In the 1850s, C.R. Lepsius published the Standard Alphabet, which was universal to all languages and the first Igbo orthography. It contained 34 letters in addition to digraphs and diacritical marks to transcribe sounds distinct to African languages.