Where does “ai” come from?

ai (Malay) comes from English Ai, from English aight, from English all right — Good; in acceptable, if not excellent condition;...

Ancestry of “ai”, step by step

Step	Language	Word	Meaning
1	English	Ai	—
2	English	aight	Contraction of all right; Okay; average; nothing...
3	English	all right	Good; in acceptable, if not excellent condition;...