Braille conversion technology is crucial for advancing information accessibility for the blind. With the rapid advancement of information globalization, the blind are increasingly exposed to bilingual information in both Chinese and English. While existing braille conversion systems have successfully translated Chinese and English into braille, they fall short in accurately converting punctuation, including poor differentiation of punctuation with multiple uses and lack of error correction for the mixed use of Chinese and English punctuation. Failure to address these issues may lead to misunderstanding of text by the blind. This study delves into these problems, designing and implementing a bilingual braille conversion system capable of distinguishing multipurpose punctuation and correcting the mixed use of punctuation. The performance of the system is evaluated by using a dataset based on BLCU Chinese Corpus. The results demonstrate that the proposed system accurately distinguishes multipurpose punctuation and corrects the mixed use of Chinese and English punctuation according to language types and context, outperforming other braille conversion systems. Overall, this research has significant potential for promoting information accessibility in China.