# Production Notes: Feature Drift, Multi-Modal Content, and Challenges of Turkish NLP

> Source: https://sukruyusufkaya.com/en/learn/oneri-sistemleri/production-notlari-feature-drift-multimodal-turkce-nlp
> Updated: 2026-05-13T13:29:34.933Z
> Category: Öneri Sistemleri
> Module: Module 4: Content-Based Filtering
**TLDR:** Module 4 closing: real problems you'll face after keeping a content-based recommender in production for 6 months. Feature distribution drift, multi-modal embeddings (image+text+audio) for cold-start power, CLIP/SBERT modern approaches, Turkish NLP specifics with stemming + BERTurk.