It seems you're referring to The Witch: Part 2. The Other One (2022), the South Korean action-horror film directed by Park Hoon-jung. "Mongol Heleer" is likely a misspelling or phonetic rendering of (Монгол хэл) — possibly indicating a request for Mongolian subtitles, dubbing, or a specific release.
For information on the movie The Witch: Part 2. The Other One with Mongolian subtitles or voiceover ( Mongol Heleer The Witch Part 2 Mongol Heleer