langchain/docs/snippets/get_started/quickstart/prompt_templates_chat_models.mdx

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```python
from langchain.prompts.chat import (
ChatPromptTemplate,
SystemMessagePromptTemplate,
HumanMessagePromptTemplate,
)
template = "You are a helpful assistant that translates {input_language} to {output_language}."
system_message_prompt = SystemMessagePromptTemplate.from_template(template)
human_template = "{text}"
human_message_prompt = HumanMessagePromptTemplate.from_template(human_template)
chat_prompt = ChatPromptTemplate.from_messages([system_message_prompt, human_message_prompt])
chat_prompt.format_messages(input_language="English", output_language="French", text="I love programming.")
```
```pycon
[
SystemMessage(content="You are a helpful assistant that translates English to French.", additional_kwargs={}),
HumanMessage(content="I love programming.")
]
```