Update README.md

README.md

@@ -13,10 +13,48 @@ language:
 - sw
 ---
 
-This is the machine-translated dataset, TransWebEdu, supporting Arabic, Welsh, German, English, Spanish, French, Indonesian, Italian, Russian, and Swahili. It is used to pretrain TransWebLLM from scratch. 
+# TransWebEdu
 
-For more details: 
-[Multilingual Language Model Pretraining using Machine-translated Data](https://arxiv.org/abs/2502.13252)  
-  
-**Contact**    
-Email: [[email protected]](mailto:jiaywang@cs.ucl.ac.uk)    
+**TransWebEdu** is a machine-translated, multi-way parallel, multilingual dataset at pretrain scale, supporting ten languages: Arabic, Welsh, German, English, Spanish, French, Indonesian, Italian, Russian, and Swahili.  
+It is used to pretrain the **TransWebLLM** model from scratch, with a focus on multilingual web-based education content.
+
+For more information, see the paper:  
+[Multilingual Language Model Pretraining using Machine-translated Data](https://arxiv.org/abs/2502.13252)
+
+## Languages Supported
+
+- Arabic (`ar`)
+- Welsh (`cy`)
+- English (`en`)
+- Spanish (`es`)
+- French (`fr`)
+- German (`de`)
+- Indonesian (`id`)
+- Italian (`it`)
+- Russian (`ru`)
+- Swahili (`sw`)
+
+## Dataset Notes
+
+- The dataset files are chunked due to large file sizes.
+- Each language's data files use a specific prefix to indicate language and script.
+
+### Language Prefix Mapping
+
+| Language     | Identifier  |
+|--------------|-------------|
+| Arabic       | `arb_Arab`  |
+| English      | `eng_Latn`  |
+| French       | `fra_Latn`  |
+| German       | `deu_Latn`  |
+| Indonesian   | `ind_Latn`  |
+| Italian      | `ita_Latn`  |
+| Russian      | `rus_Cyrl`  |
+| Spanish      | `spa_Latn`  |
+| Swahili      | `swh_Latn`  |
+| Welsh        | `cym_Latn`  |
+
+## Contact
+
+For questions or feedback, please contact:  
+[[email protected]](mailto:[email protected])