Evidence from multiple studies confirms that regional linguistic backgrounds and native accents directly influence phonetic pronunciation and production difficulties through negative transfer and dialectal interference.
Papers [3], [9], and [10] explicitly discuss how regional accents, dialects, or native linguistic backgrounds directly shape and interfere with phonetic pronunciation and spelling, supporting the claim. The remaining papers are tangential or deal with different topics like speech recognition technology, neural processing, or bilingual pause fillers without directly contesting the claim.