Romanization of Wu Chinese
Wu Chinese has three major schools of romanization.
The most popular school, Common Wu Pinyin (通用吴语拼音), was developed by amateur language clubs and local learners. There are two competing schemes; both adhere to the International Phonetic Alphabet (IPA) and are very similar to each other. The initial scheme was "Wu Chinese Society pinyin" (吴语协会拼音, developed around 2005) and it formed the basis of "Wugniu pinyin" (吴语学堂拼音, around 2016). Either of them is the default romanization scheme in most learning materials.
The second school is the Latin Phonetic Method (吴语拉丁式注音法, French-Wu or Fawu [法吴]). Its use is in decline. It utilizes the similarities between French and Wu phonetics and thus adheres to both IPA and French orthography. It was developed in 2003 by a Shanghai-born surgeon based in Lyon, France.
The final, and least used school, adheres to Mandarin-Putonghua pinyin as sanctioned by the State Council. It is the only school developed by professional linguists, mostly working in state-administered universities. While more than 20 competing schemes within this school have been published since the 1980s, the most notable one is the Shanghainese Pinyin (上海话拼音方案, often shortened to Qian's Pin [钱拼]), developed by Qian Nairong in 2006.