The spelling of the word "blattner" can be explained using IPA phonetic transcription. The initial sound is "bl," which is a voiced bilabial stop. The next sound is "æ," which is a front, unrounded vowel. The double "t" indicates a voiceless alveolar stop, followed by "n," which is a voiced alveolar nasal. The final sound is "ər," which is a schwa sound followed by a voiced alveolar flap. Therefore, the spelling of "blattner" reflects its phonetic pronunciation.