Original sentence: Ancient Macedonian was an Indo-European language most likely closely related to Greek, but its exact relationship is unclear: possibly a dialect of Greek; a sibling language to Greek; or a close cousin to Greek, and perhaps related to some extent, to Thracian and Phrygian languages.Knowledge of the language is very limited because there are no surviving texts that are indisputably written in the language, though a body of authentic Macedonian words has been assembled from ancient sources, mainly from coin inscriptions, and from the 5th century lexicon of Hesychius of Alexandria, amounting to about 150 words and 200 proper names, similar to standard Greek, but a  small minority might not easily reconciled with standard Greek phonology
Edited sentence: A body of Macedonian words has been assembled from ancient sources, mainly from coin inscriptions, and from the 5th century lexicon of Hesychius of Alexandria, amounting to about 150 words and 200 proper names, similar to standard Greek, with a  small minority(approximatelly 15 words, from the total 150) which might not easily reconciled with standard Greek phonology.Ancient Macedonian was an Indo-European language of the Hellenic family tree,  but its exact relationship is unclear: possibly a dialect of Greek; a sibling language to Greek; or a close cousin to Greek, and perhaps related to some extent, to Thracian and Phrygian languages.There is no text from Macedonia or by a Macedonian author, in a language other than Greek.This description has been adopted by the SIL ISO-Standards, as well