Narrated Zayd ibn Thabit: The Messenger of Allah ﷺ ordered me (to learn the writing of the Jews), so I learnt for him the writing of the Jews. He said: I swear by Allah, I do not trust Jews in respect of writing for me. So I learnt it, and only a fortnight passed that. I mastered it. I would write for him when he wrote (to them), and read to him when something was written to him.
Hadith Referenceسنن ابي داود / كتاب العلم / 3645
Hadith Gradingالألبانی:حسن صحيح | زبیر علی زئی:إسناده حسن, أخرجه الترمذي (2715 وسنده حسن)
Benefits and Issues: ➊ Acquiring knowledge of any language or script of non-Muslims, for religious or worldly purposes, is not impermissible. However, making it a part of one’s own culture is impermissible. And when this knowledge is acquired for religious purposes, there is reward in it as well.
➋ And these languages should be taught to those individuals among the Muslims who have a need for them. Otherwise, making it a general part of the curriculum and declaring it compulsory is a great injustice both religiously and worldly.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 3645