```typescript
import { ChatOpenAI } from "langchain/chat_models/openai";
import { LLMChain } from "langchain/chains";
import {
  ChatPromptTemplate,
  SystemMessagePromptTemplate,
  HumanMessagePromptTemplate
} from "langchain/prompts";

const template = "You are a helpful assistant that translates {input_language} to {output_language}.";
const systemMessagePrompt = SystemMessagePromptTemplate.fromTemplate(template);
const humanTemplate = "{text}";
const humanMessagePrompt = HumanMessagePromptTemplate.fromTemplate(humanTemplate);

const chatPrompt = ChatPromptTemplate.fromPromptMessages([systemMessagePrompt, humanMessagePrompt]);

const chat = new ChatOpenAI({
  temperature: 0,
});

const chain = new LLMChain({
  llm: chat,
  prompt: chatPrompt,
});

const result = await chain.call({
  input_language: "English",
  output_language: "French",
  text: "I love programming",
});
```
```typescript
// { text: "J'adore programmer" }
```