Why "blatent" is a blatant blunder

What kind of error is it?

It is a spelling error.

Why do people make this mistake?

People often confuse the suffixes "-ant" and "-ent" because they are pronounced similarly and both are common in English adjectives. This phonetic similarity can lead to misspellings, especially since many English words legitimately end with "-ent", such as "different" or "excellent". The inconsistency of English spelling rules contributes to this common mistake.

What is correct?

"Blatant" is the correct spelling. The word "blatant" means something that is done openly and unashamedly or is very obvious. It often carries a negative connotation, implying that something is done offensively or conspicuously.