In Ukrainian dialects, “stream” also goes by other names: потік (Boyko dialect, Hutsul dialect, Transcarpathian dialect); потічок (Dniester dialect).
English by region: creek (Mid-Atlantic US, Midwestern US, Southern US, Western US); brook (East Midlands, New England, West Midlands); burn (North East England, Scotland); beck (North West England, Yorkshire).
In other languages: струмок (Ukrainian), Strömung (German), ruisseau (French), arroyo (Spanish), strumień (Polish).