Where does “Myanmarese” come from?

Myanmarese (English) comes from English -ese, from Middle English -eys, from Old French -eis, from Late Latin -iscus.

Myanmarese (English): Of, from, or pertaining to Myanmar (also known as Burma), or its people or language

Definitions

Of, from, or pertaining to Myanmar (also known as Burma), or its people or language

Step	Language	Word	Meaning
1	English	-ese	Used to form adjectives and nouns describing...
2	Middle English	-eys	Alternative form of -esse
3	Old French	-eis	used to form nationalities; used to form names of...
4	Late Latin	-iscus	—