> ## Documentation Index > Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt > Use this file to discover all available pages before exploring further. # LanguageType Restrict to natural-language or programming-language tagged activity. Sourced from a sampled, upsampled dataset, so `total_tokens` is an estimate and is aggregated weekly (the trailing weekly bucket may include traffic past `end_date`). Cannot be combined with `modality`, `context_bucket`, or `category`. ## Example Usage ```typescript theme={null} import { LanguageType } from "@openrouter/sdk/models/operations"; let value: LanguageType = "natural"; // Open enum: unrecognized values are captured as Unrecognized ``` ## Values ```typescript theme={null} "natural" | "programming" | Unrecognized ```