The newly redesigned Tailingua has just issued a useful list of dictionaries of the Taiwanese language and related dialects (PDF).

Here’s a random sample:

• Dyer, Samuel 萊撒母耳 (1838 ). A Vocabulary of the Hok-keen Dialect as Spoken in the County of Tsheang- Tshew [漳州音字典]. Malacca: Anglo-Chinese College Press.
• Embree, Bernard L.M. 晏寶理 (1973). A Dictionary of Southern Min [閩南語英語辭典]. Kowloon: Hong Kong Language Institute.
• Fùxīng wénhuà shìyèshè 復興文化事業社 (2004). Táiwān mǔyǔ yīnbiāo zìdiǎn 臺灣母語音標字典 [Taiwanese mother tongue pronunciation dictionary]. Táinán: Fùxīng Wénhuà Shìyèshè 復興文化 事業社.
• Hare, G.T. (1904). The Hokkien Vernacular [福建白話英文字典]. Kuala Lumpur: Straits Settlements and Selangor Government Printing Offices.
• Hóng Guóliáng 洪國良 (2004). Héluòyǔ yīnzì duìzhào diǎn 河洛語音字對照典 [Comparative dictionary of Ho-lo pronunciation]. Gāoxióng: Fùwén 復文.
• Hóng Hóngyuán 洪宏元 (2009). Xuéshēng Tái–Huá shuāngyǔ huóyòng cídiǎn 學生台華雙語活用辭典 [Bilingual everyday Taiwanese–Mandarin dictionary for students]. Táiběi: Wǔ Nán Túshū Chūbǎn Yǒuxiàn Gōngsī 五南圖書出版有限公司.
• Hú Xīnlín 胡鑫麟 (1994). Shíyòng Táiyǔ xiǎo cídiǎn 實用臺語小辭典 [Practical pocket Taiwanese dictionary]. Táiběi: Zìlì Wǎnbào Chūbǎnbù 自立晚報出版部.