Hi,
Given birth-details place Udaya Lagna or Ascendent in the Zodiac sign of Gemini or Mithuna Rashi, alongside a powerfully placed Rahu and aspected by 7th & 10th lord Jupiter/Guru-dev, placed along with Ketu.
Lagna Lord and 4th lord Mercury/Budha is placed in the 9th house and posited in the Lunar Constellation of Satabisha Nakshatra, ruled by Rahu.
Moon/Chandra is the 2nd lord. He is placed in the 12th house and posited in the Lunar Constellation of Kritika Nakshatra, ruled by 3rd lord of Communication Sun/Ravi, placed in the 10th house of Karma-Sthana. He seems to be quite powerful (has Digbala, high Shadbala and Vimsopaka Bala in Dasha Varga). So, the little one started his life in the midst of Sun/Ravi Maha-Dasha and switched to that of Moon/Chandra from early 2021.
Incidentally, there seems to be a strong foot-print and an undeniable influence of Sun/Ravi in the birth-chart. Moon/Chandra, Venus/Shukra, Jupiter/Guru-dev, Saturn/Shani-dev and Mars/Kuja are all posited in the Lunar Constellations of either Krithika Nakshatra or Uttarashada Nakshatra, ruled by Sun/Ravi… who himself is posited in the Lunar Constellation of Uttara-Bhadrapada Nakshatra, ruled by Saturn/Shani-dev… thereby participating in a Sukshma Parivarthana, at the Nakshatra level and activating all the Dusthana (6th, 8th and 12th) lords, along with low-profile miscreants Maandi & Gulika (who are placed in the 3rd house of Communication in the Zodiac sign of Leo or Simha Rashi). More importantly, Saturn/Shani-dev and Mars/Kuja are very powerfully placed in the Zodiac sign of Capricorn or Makara Rashi (Saturn/Shani-dev’s Swasthana and Mars/Kuja’s Uccha-Sthana or sign of exaltation) and in very close conjunction, creating a very strong Agni-Marutha Yoga. So, the child has abundance of energy and extreme temperament… more of uncontrollable anger issues. This could very well morph into personality issues.
On the sideline, Saturn/Shani-dev, Mars/Kuja, Jupiter/Guru-dev, Moon/Chandra and Rahu-Ketu are all very powerfully placed (and most of them are currently activated) and are influencing the child. He is having a hard time managing such varied / very strong influences and at a very young age. So, it would make sense for you to consider propitiating and calming them down. In my humble opinion, you are dealing with a lot more than communication problem (just imagine what happens to folk, when they lose their temper… the child seems to be dealing with a whole lot more),
Take care…