Answered by Shaykh Amjad Rasheed
Is talking after ‘isha disliked or forbidden? Is it permissible for someone to talk with his wife? Is there a special ruling for places at extremely northern latitudes where the time for isha enters extremely early (e.g. 5.30 p.m.)?
Speaking after ‘isha without need is disliked; not forbidden. Among the needs [h. which eliminate the disliked-ness from after-‘isha speech] are speaking with one’s wife (because of the comforting that this entails), chatting with one’s guest, or talking about sacred knowledge: none of these are disliked.
Ibn Hajar said in the Tuhfa (along with the Minhaj):
It is disliked to (sleep before it or talk after it) i.e. after the entrance of its time and performing it in it, or [h. after] this quantity [h. of time has passed] if it is prayed early [h. in the time of maghrib]–not before this, according to the stronger (awjah) position. This is because doing so might cause one to miss the night-vigil prayer, or to miss praying the fajr prayer at the first of its time, or missing the fajr prayer altogether. It is also so that one concludes one’s day with the best of actions. Someone who is waiting for a group to repeat his prayer with them and travellers (are excepted), because of the hadith of Ahmad, “There shall be no conversing after ‘isha except for someone who is praying, a traveller, or someone who has an excuse.” [h. Conversing] (about something good) such as sacred knowledge, one of its ancillary disciplines (such as grammar), reading, making remembrance of Allah, remembering the stories of the righteous, making a guest feel comfortable, or a wife during her wedding night, or playing around with her etc. [h. are also excepted and are not disliked] (and Allah knows best). This is because of the rigorously authenticated hadith that “he (Allah bless him and give him peace) used to tell them on most nights about Bani Isra’il,” and because it is a good that will surely be attained, which should not be left for a detriment that is merely possible.
As for the lands mentioned in the question, I have not come across an explicit text about them, but the scholars’ unqualified expression indicates that they are just like other lands. So if the speech and conversation is for a need, then it is not disliked (as mentioned above), but if it is not for a need, then it is disliked, as can be inferred from what has preceded of the Tuhfa when it explains the disliked-ness by saying that it causes one to miss the night-vigil prayer and says that one should conclude one’s day with the best of one’s works.
And Allah knows best about what is correct.
Amjad
[Translated by Sidi Hamza Karamali]