Update README.md

README.md

@@ -40,4 +40,17 @@ size_categories:
 from datasets import load_dataset
 
 load_dataset("tdtunlp/opus100_envi")
+```
+
+- Format for Translation task
+
+```python
+def preprocess(sample):
+    eng = sample['en']
+    vie = sample['vi']
+    return {'text': f'<|startoftext|><|eng|>{eng}<|vie|>{vie}<|endoftext|>'}
+
+"""
+<|startoftext|><|eng|>What is it?<|vie|>Cái gì đó?<|endoftext|>
+"""
 ```