"Soliloquizing" is a word in ENGLISH

himulúngon - (H) Words, speech, say; to speak, say, express in words. Naghimulúngon siá sa íya nga kaugalíngon sing súbung——. …

One who soliloquizes; esp., one who monopolizes conversation in company.

The habit of soliloquizing, or of monopolizing conversation.

To utter a soliloquy; to talk to one's self.

of Soliloquize