Is indifference to uttering a foreign sentence that might be blasphemous, with the intention of pronouncing it later to ascertain its meaning, considered a lack of concern for one’s religion, or is it merely a whisper from Satan (waswasa)?

Our advice is to turn away from obsessive thoughts and not to give in to them. You will not be held accountable for what you think to yourself. You must guard your tongue and be careful about what you utter in the future, without succumbing to obsessive thoughts.