Its beginning roughly corresponds with the rise of the Taungoo Dynasty and its transition to Modern Burmese with the beginning of the Konbaung Dynasty.
Its transition to Modern Burmese occurred in the 18th century.
[2] The transition from Old Burmese to Middle Burmese included phonological changes (e.g., mergers of sound pairs that were distinct in Old Burmese) as well as accompanying changes in the underlying orthography.
[2] However, many features of Middle Burmese have been preserved in the literary tradition (high register) of written Modern Burmese, including grammatical markers and lexical particles.
[2] Word order, grammatical structure and vocabulary have remained markedly comparable, well into Modern Burmese, with the exception of lexical content (e.g., function words).