Perform language detection across configured providers & merge results.
Determine target/pivot languages given negotiation inputs.
Attempt pivot normalization of content (source->pivot) if pivot provided.
Optional pivot: stringTranslate post-generation to user display target (if differs).
Translate query for RAG pivot search.
Translate retrieved RAG results back to target language.
Wrap tool input translation logic.
High-level language orchestration service used by AgentOS runtime.