namaskāragaḷu
"greetings (formal plural)" in spoken Kannada is namaskāragaḷu. It's a interjection / noun (plural) that you'll first encounter in Lesson 8: Nice to Meet You — Office Introductions of the KannadaMaadi course, where Anu and Ravi use it in context.
Grammar note more formal than namaskāra; -gaḷu is the plural suffix
Heard in a real Bengaluru conversation
Words land faster when you hear them inside a real sentence. namaskāragaḷu is used in Lesson 8 (Nice to Meet You — Office Introductions, CEFR A2) — a short audio conversation between Anu and Ravi set in a recognisable Bengaluru situation.
Open Lesson 8 →