Bosniak is sometimes used in reference to Bosnian muslims.
Bosniak means Bosnian? If Bosnian describes them, why do we need Bosniak? I think Biden made it up.
"The Bosniaks or Bosniacs[25] (Bosnian: Bonjak, pl: Bonjaci, IPA: [bɔ'ʃɲaːt͡si]) are a South Slavic people, living mainly in Bosnia and Herzegovina ("Bosnia") and the Sandak region of Serbia and Montenegro, with a smaller autochthonous population also present in Croatia, Kosovo and the Republic of Macedonia. Bosniaks are typically characterized by their tie to the Bosnian historical region, traditional adherence to Islam, and common culture and language.
"In the English-speaking world, Bosniaks are most commonly known as Bosnian Muslims, although Bosniaks make up 48% of the population while only 40% of the population (of B&H) is Muslim.[26] The term "Bosnians", also used interchangeably, can also be used to denote all inhabitants of Bosnia regardless of ethnic origin (i.e. not only Bosniaks, but also Bosnian Serbs, Bosnian Croats or any other group in the country).[27]"
--Wikipedia
Bozniaks are what Bosnian moslems call themselves. A little wink to the insider play.