> (What even is the point of doing `Locale.setDefault()` with the same Locale that `Locale.getDefault()` returned? I don't know anything about Android.)

The code intends to trim the country, variant and any extensions from the value returned from `Locale.getDefault()`

Example: "Chinese (Traditional) - Taiwan" to "Chinese"

Pseudocode:

`zh_Hant_TW` -> `zh`

It also normalizes to fix some Android internal mapping issues due to changes in ISO 639 (Hebrew can be `iw` or `he[b]`)