Having the right intention is vital in everything in Islam. So it goes without saying that, we should have the right intention when learning Arabic. Learning Arabic forms the foundation of a good Islamic education so an impure intention threatens to undermine everything we learn based on the study of Arabic if our intention is not purely for Allah alone. Every student of knowledge should correct their intention from the very start of their journey that they are seeking knowledge for the sake of Allah alone. Learning Arabic for the purpose of gaining a worldly benefit will undermine the amazing reward that is in store for the students.
A wrong intention could also be a cause for regret or punishment in the hereafter depending on what was intended. If the intention happened to be to learn Arabic, for example, to be able to talk to people from an Arab country or to find a better job in the Middle East, then the reward for learning Arabic for the sake of understanding the Quran and Islam will not be attained. But if the intention was to show off to people how good a scholar one is and to try to gain a position based on the piety that people associate with knowing Arabic, that in fact could cause the person to be punished in the hereafter.
Therefore we need to purify our intention before we ever start learning Arabic (or learning anything for that matter). And we should check our intention often and correct it if we find it straying away from purely for understanding the Quran and Islam for the pleasure of Allah. And re-evaluate the intention and correct it after the fact as well. This will ensure that our reward is guaranteed and we don’t end up deserving punishment on the Day of Judgement. May Allah protect us all from an evil end.
And Allah knows best.