Why would the name of the 慈祐宮 temple in Taipei sometimes be written "Cinyou" instead of "Ciyou"? Near where I'm staying in Taipei there is a temple called 慈祐宮. Most signs write 慈祐 in pinyin as "Ciyou", but some write it as "Cinyou".



Would this just be a mistake or could there be a reason for it:


Could it be another Romanization system rather than Hanyu Pinyin?
Could it be for another language/dialect rather than for Standard Mandarin Chinese?
Taiwanese minnan. /i/ changes to palatalized /ĩ/, and so ci becomes cin.