When talking about Allah, the Qur'an, or anything in Islam really, we should be knowledgeable:
...My Lord has only forbidden... ...that you say about Allah that which you do not know. -- Qur'an 7:33
As I live in a country (China) where the local language is not my native language, I'm consequently hesitant to speak about Islam in Chinese in case I inadvertently misspeak.
Question: What level of fluency should one have when discussing Islam in a second language?
While I understand that I can reasonably expect to be forgiven for isolated mistakes, I nevertheless shouldn't say things about Allah, the Qur'an, etc., recklessly.