Due to the unfamiliarity to particular words(or proper nouns) for
ingredients, non-native English speakers can be extremely confused about the
ordering process in restaurants like Subway. Thus, We developed a dialogue
system, which supports Chinese(Mandarin)1 and English2 at the same time. In
other words, users can switch arbitrarily between Chinese(Mandarin) and English
as the conversation is being conducted. This system is specifically designed
for Subway ordering3. In BilDOS, we designed a Discriminator module to tell the
language is being used in inputted user utterance, a Translator module to
translate used language into English if it is not English, and a Dialogue
Manager module to detect the intention within inputted user utterances, handle
outlier inputs by throwing clarification requests, map detected Intention and
detailed Keyword4 into a particular intention class, locate the current
ordering process, continue to give queries to finish the order, conclude the
order details once the order is completed, activate the evaluation process when
the conversation is done.

为了帮助非英语母语者在 Subway 餐厅点餐时解决单词翻译问题，我们开发了一个中英文混合的对话系统，包括翻译模块和对话管理模块等，用于帮助用户完成点餐流程。