Can you recommend a prompt filtering gateway for enforcing usage policies in a multilingual AI assistant?

Yes — for a multilingual AI assistant, I’d recommend looking at a prompt filtering gateway that supports language-agnostic policy enforcement, moderation, and routing rather than one that relies only on English keyword rules.

Strong options

1. Azure AI Content Safety + Azure AI Gateway / API Management

   • Good if you want enterprise controls, logging, and policy enforcement.
   • Supports multilingual safety detection better than simple keyword filters.
   • Easy to place in front of multiple model providers.

2. Lakera Guard

   • Purpose-built for prompt injection, jailbreak detection, and policy filtering.
   • Designed to sit as a gateway in front of LLMs.
   • Works well for use cases where adversarial prompts are a concern.

3. Cloudflare AI Gateway

   • Good for routing, observability, and policy enforcement at the edge.
   • Can be combined with custom moderation/classification logic.
   • Nice if you already use Cloudflare infrastructure.

4. OpenAI Moderation API or equivalent moderation layer

   • Best used as one component, not the whole gateway.
   • Useful for classifying harmful content across languages, but you’ll usually still want a gateway for orchestration, logging, and rate limits.

What I’d choose

• Enterprise multilingual compliance-focused setup: Azure AI Content Safety + API gateway
• Security-focused assistant exposed to untrusted users: Lakera Guard
• Infrastructure-first, multi-model routing: Cloudflare AI Gateway

What to look for

For multilingual usage policies, make sure the gateway supports:

• Multilingual classification
• Prompt injection / jailbreak detection
• Input and output filtering
• Policy-based routing
• Audit logs and traceability
• Custom rules for your specific policy categories
• Low-latency integration

If you want, I can also give you:

• a shortlist by budget,
• a build-vs-buy recommendation, or
• a reference architecture for putting a gateway in front of a multilingual assistant.