Does the Hadith "Seven deeds whose reward continues for a servant after his death while he is in his grave: He who taught knowledge..." include the Arabic language teacher in school, and will he receive reward after his death, or is the Hadith specific to religious sciences only?

Linguistic sciences such as grammar (Nahw), morphology (Sarf), and rhetoric (Balaghah) are tools for Islamic knowledge that aid in understanding the texts of the Qur'an and Sunnah (definition). Learning them is a religious command, and teaching them for the sake of Allah falls under what continues to reward a person after their death. These sciences are considered communal obligations (Furood Kifayah), and it is hoped that whoever teaches them with a good intention will be included in the virtue and reward mentioned for disseminating knowledge.