Update README.md

README.md

@@ -30,4 +30,79 @@ tags:
 - Java
 - JavaScript
 - C/C++
----
+---
+
+# Dataset Card for `multilang-eval-quality`
+
+## Description
+
+The `multilang-eval-quality` dataset is a multilingual and multi-domain dataset designed for evaluating language model performance during training. It can be used for
+performance tracking, generalization diagnostics across languages or domains, and for implementing early stopping mechanisms.
+
+The examples included were automatically selected as **High quality** by the [`EuroBERT-210m-Quality`](https://huggingface.co/TempestTeam/EuroBERT-210m-Quality) model,
+trained to estimate web text quality in multiple languages.
+
+## Dataset Composition
+
+- **Natural Languages**:
+  - English: 2,640 examples (from FineWeb)
+  - French: 2,720 examples (from FineWeb-2)
+  - Spanish: 2,640 examples (from FineWeb-2)
+
+- **Programming Languages** (from The Stack v2):
+  - Python: 500 examples  
+  - Java: 500 examples  
+  - JavaScript: 500 examples  
+  - C: 250 examples  
+  - C++: 250 examples  
+
+- **Total**: 10,000 high-quality examples
+
+## Data Structure
+
+Each example includes the following fields:
+
+- **`text`** (*string*): the textual content or source code.
+- **`lang`** (*string*): the language of the content (e.g., `English`, `French`, `Spanish`, `Python`, `C++`, etc.).
+- **`type`** (*string*): the type of content:
+  - `"NL"` for natural language
+  - `"CL"` for code language
+- **`id`** (*string*): a unique identifier generated by hashing the `text` field.
+
+## Use Cases
+
+This dataset is intended for **periodic evaluation** during language model training:
+
+- Tracking performance on high-quality data
+- Evaluation per batch or epoch
+- Validation metric computation for early stopping
+- Performance comparison by language or domain
+
+It is **not intended for direct training**, due to its limited size and its purpose as a filtered evaluation sample.
+
+## Licenses
+
+The dataset is built from sources under the following licenses:
+
+| Source                | License          |
+|:---------------------:|:----------------:|
+| FineWeb               | ODC-BY 1.0       |
+| FineWeb-2             | ODC-BY 1.0       |
+| The Stack v2          | Other            |
+| EuroBERT-210m-Quality | Apache-2.0       |
+
+Users must ensure they comply with the specific license conditions when reusing or redistributing this data.
+
+## Risks and Limitations
+
+### Sensitive Data
+
+The original sources are from the public web and were automatically cleaned. Despite filtering, some data may still contain sensitive, personal, or confidential information.
+
+It is strongly recommended **not to use this dataset in production or user-facing systems without manual review**.
+
+### Bias
+
+- Quality annotations were produced by an automatic classifier and may reflect its training biases.
+- The dataset covers only three natural languages and five programming languages.
+- Cultural, thematic, or syntactic biases may be present depending on the source corpora.