Cusco–Collao (Spanish, also Cuzco–Collao) or Qusqu–Qullaw (Quechua) is a collective term used for Quechua dialects that have aspirated (tʃʰ, pʰ, tʰ, kʰ, qʰ) and ejective (tʃʼ, pʼ, tʼ, kʼ, qʼ) plosives, apparently borrowed from Aymaran languages.
In 1975, the term "Cusco-Collao" was coined by the government of Juan Velasco Alvarado as the name of one of six officially recognized regional varieties of Quechua in Peru, and is still used in both Spanish and Quechua forms in publications of the Peruvian government[2] and SIL International.
"small stone": rumisitu in Bolivia vs. rumicha in both Cusco and Ayacucho).
Typical for Cusco-Collao dialects is the appearance of subordinating conjunctions, e.g. imaraykuchus (because) and sichus (if), or relative pronouns, e.g. pitachus (whom) or imachus (that, what), which are uncommon in Ayacucho Quechua and other Quechua varieties.
[6] Otherwise, subordination in Quechua can be expressed by means of suffixes and infixes like -pti- and -spa or (to substitute relative clauses) -q, -sqa and -na.