# Locales Locale targeting enables you to display your ads to users based on the primary language set in their Telegram app. This is useful for tailoring your messaging to specific language-speaking audiences, ensuring your advertising budget is spent efficiently by focusing on users who can understand and engage with your content. We use the [ISO 639-1](https://en.wikipedia.org/wiki/List_of_ISO_639_language_codes) standard to display the list of languages available for targeting. **Cost**: when enabled, the user‑defined cost per click (CPC) or cost per 1000 impressions (CPM) is increased by 50%. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://tads.gitbook.io/docs/getting-started/advertisers/ad-targeting/locales.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.