Add LICENSE.md documentation

LICENSE.md

@@ -1,8 +1,67 @@
-# License Summary
+# License
 
-            This subset is CC BY 4.0 and derived from the colloquial YouTube-comment corpus.
+This corpus is a **mixed-source dataset** with multiple licenses. Each row is tagged with a `license` field indicating its source license.
 
-            ## Row-Level Guidance
-            - Check the `license` field in the parquet file before reuse.
-            - Preserve attribution for source material when required.
-            - Apply additional review before commercial redistribution.
+## License Breakdown by Source
+
+### IRIISNEPAL Dataset
+- **License:** MIT
+- **Rows:** ~6.0 million
+- **Source:** https://github.com/bnltm/IIIiSNepal
+- **Applies to:** `nepali-formal-corpus`
+
+### Nepali Wikipedia
+- **License:** CC BY-SA 4.0
+- **Rows:** ~291,000
+- **Source:** Nepali Wikipedia dump
+- **Attribution:** Derived from Wikipedia contributors
+- **Applies to:** `nepali-formal-corpus`
+
+### Scraped News Sources
+- **License:** Source-dependent
+- **Rows:** ~87,000
+- **Sources:** 
+  - Kantipur News (private use)
+  - Setopati (private use)
+  - Nepal Khabar (private use)
+  - Nagarik (private use)
+  - Other Nepali news outlets
+- **Note:** News articles are included under fair-use research assumptions. Please verify licensing with original publishers for commercial use.
+- **Applies to:** `nepali-formal-corpus`
+
+### YouTube Comments
+- **License:** CC BY 4.0
+- **Rows:** ~431,000
+- **Source:** YouTube API (public comments)
+- **Attribution:** YouTube commenters
+- **Applies to:** `nepali-colloquial-corpus`, `roman-nepali-corpus`
+
+## Usage Guidance
+
+- **For academic research:** All sources are permissible under academic fair-use principles.
+- **For commercial use:** Filter by license field. Use only MIT and CC BY 4.0 rows, or obtain permissions from news outlets.
+- **For compliance:** Review the `license` column in each dataset to filter by acceptable licenses for your use case.
+
+## Recommended Attribution
+
+If you use this corpus, cite it as:
+
+```
+@dataset{nepali_text_corpus_2026,
+  author = {Aadarsha Chhetri},
+  title = {Nepali Text Corpus},
+  year = {2026},
+  organization = {Hugging Face Datasets},
+  url = {https://huggingface.co/datasets/Boredoom17/nepali-text-corpus}
+}
+```
+
+And acknowledge individual sources:
+- IRIISNEPAL for formal text
+- Wikipedia contributors for encyclopedia content
+- Nepali news outlets for journalism
+- YouTube commenters for colloquial speech
+
+---
+
+**Last Updated:** April 2, 2026