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preserve language in conversation retrieval (#4969)

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Without the addition of 'in its original language', the condensing
response, more often than not, outputs the rephrased question in
English, even when the conversation is in another language. This
question in English then transfers to the question in the retrieval
prompt and the chatbot is stuck in English.

I'm sometimes surprised that this does not happen more often, but
apparently the GPT models are smart enough to understand that when the
template contains

Question: ....
Answer:

then the answer should be in in the language of the question.
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Hans van Dam 2023-05-22 06:16:03 +02:00 committed by GitHub
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langchain/chains/conversational_retrieval/prompts.py
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@ -1,7 +1,7 @@
# flake8: noqa
from langchain.prompts.prompt import PromptTemplate
_template = """Given the following conversation and a follow up question, rephrase the follow up question to be a standalone question.
_template = """Given the following conversation and a follow up question, rephrase the follow up question to be a standalone question, in its original language.
Chat History:
{chat_history}