> I still haven't fathomed why ETSI chose AMBE+2 for DMR. It's a codec made by an American company for compressing American English speech and it works reasonably well for that purpose. However, most speakers in my native language sound as if they were drunk or having a stroke.

A lack of ethnic diversity in vendors and standardization committees, which has also led to issues such as the "racist soap dispenser" (https://gizmodo.com/why-cant-this-soap-dispenser-identify-da...).

When most or all testing is exclusively done on White US-english male persons, issues such as a lack of sensitivity/quality for anything diverging from that norm only crop up when it is way too late to fix.