catch up on = يمسك , يأخذ = to do some thing necessary that you didn't have time to do it in the past ليفعل شيء ما ضروري ولايملك الوقت ليفعله في الماضي
stays in touch = تبقى على تواصل = to communicate with some regulary = لتتصل مع شخصا ما بشكل عادي
no sweat = لامشكله =no problem or that easy =لا مشكله او سهل
comments = تعليقات = an opinion or statement about something or some one=آراء حول شخص ما او شيء ما
charge=تكلفة = cost or fee = تكلفة او أجره