مساء الخير يكلم شخص او اشخاص مثال: أحمد يكلم أخيه يتكلم عن موضوع او عن نفسه او مع الناس مثال: أحمد لا يحب أن يتكلم عن نفسه أحمد يتكلم عن التلوث يتكلم أحمد مع أخته

Answer by "Hatem El-Nagar" is in standard Arabic. I suppose you're learning Egyptian dialect, right? So, I'll explain usages and pronunciations in Egyptian dialect. يكلم pronounced as "yekalem" mean "talk to" بيكلم صاحبه =beikalem sa7bo =He's talking to his friend يتكلم pronounced as "yetkalem" means "talk". هو بيتكلم =howa beitkalem =He's talking If you added عن it means "about". For example: هو بيتكلم عن صاحبه =howa beitaklem 3n sa7bo =He's talking about his friend If you added مع it means "with". For example: هو بيتكلم مع صاحبه =howa beitkalem m3a sa7bo =He's talking with his friend Note: If you saw يكلم is used instead of يتكلم , for example: هو بيكلم عن صاحبه =howa beikkalem (not beikalem) 3n sa7bo. (pronunciation is a bit different, we use it in speaking more than writing) =He's talking about his friend. And of course, you can conjugate both verbs with other subjects. Hope this helps.

The difference that "يتكلم" need a preposition for example (يتكلم مع,يتكلم الي), but "يكلم" doesn't need. But the same meaning.

Sorry, you are right, I was talking in 3amaya!