> Identifying a substring is valid in every human language I know of, as long as the substring itself is semantically meaningful Doesn't work with ZWJ emoji, f

> Identifying a substring is valid in every human language I know of, as long as the substring itself is semantically meaningful Doesn't work with ZWJ emoji, for example, the "job" emojis are made by combining a "person" emoji and another emoji related to the job. For example the emoji for a male pilot is encoded as man+ZWJ+plane. It means the "plane" emoji (a meaningful substring) will be found in the "pilot" emoji even though it is a different thing. I don't know if the same thing happens in natural languages. Some languages use ZWJ, or combining diacritics, but I don't know how acceptable, for instance, looking for "e" and finding "é" would be.