Does uttering a forbidden word without knowing its meaning lead to apostasy?

One should not dwell on obsessive whispers [waswas]. Whoever utters a word of disbelief [kufr] without knowing its meaning does not become a disbeliever [kafir] by it, because he did not intend disbelief. Nor does one become a disbeliever if he narrates an act of disbelief he heard, while not believing it, nor if he pronounces a word of disbelief without knowing its meaning, nor if it slips from his tongue unintentionally; based on the hadith (definition): "My Ummah has been forgiven for mistakes and forgetfulness," and the story of the man who erred out of extreme joy. Uttering forbidden words does not necessitate disbelief; rather, it is a sin that requires repentance.