> ## Documentation Index > Fetch the complete documentation index at: https://docs.mention-me.com/llms.txt > Use this file to discover all available pages before exploring further. # Locales, Languages and Currencies > How to configure locales to segment your referral campaigns by customer region, language, and currency. A locale defines the customer's language, region, and currency. For example, the locale for UK English using GBP is **en\_GB**. With Mention Me, you can deliver specific campaigns or referral offers by locale, passed via your integration (JavaScript tags for websites, API calls for apps) using a set format. Locale parameter format example in tag configuration You can configure locales within your campaign's triggering or qualifying rules. Campaign locale triggering rules in the Mention Me platform ## How to segment customers by locale Prioritise key regions/locales based on volume or value. If your referral program offers third-party rewards like Amazon vouchers, ensure those providers cover the relevant locales. Your Client Manager can help define an effective segmentation strategy. ### Different language and currency Pass the correct locale via tags or API calls: * British Campaign: **en\_GB** * French Campaign: **fr\_FR** * Spanish Campaign: **es\_ES** * German Campaign: **de\_DE** ### Same language, different currency Serve offers to regions using the same language but different currencies by targeting relevant locales. Example: English-language campaigns in the UK (GBP) and the US (USD) using **en\_GB** and **en\_US**. ### Same region and currency, different language Create localised campaigns for users in a region who select different languages on your site. Example: Target both **es\_ES** (Spanish) and **en\_ES** (English) customers within Spain (EUR). ### Group regions by the same language and currency Target multiple regions under a shared locale if they use the same language and currency. Example: Use **en\_EU** for all English-speaking users in Eurozone countries. ### Group regions with shared language and generic offers Useful for smaller or less-active markets. Serve a general campaign across several regions using one shared locale with a non-market-specific offer (like a percentage discount or gift with purchase). If using discount codes, ensure they're valid across all regions. This setup does not support fixed-amount offers (e.g. £10 off) or third-party vouchers. It limits your ability to run A/B tests across locales. Contact your Client Manager for consultation. ## Locale format The format must follow: * [ISO 639-1 language code](https://en.wikipedia.org/wiki/List_of_ISO_639-1_codes) + underscore (`_`) * [ISO 3166-1 alpha-2 country code](https://en.wikipedia.org/wiki/ISO_3166-1#Current_codes) Examples: * `fr_FR` = French / France (EUR) * `en_IE` = English / Ireland (EUR) * `en_GB` = English / UK (GBP) Your active locales will be listed in your order form. Contact your Client Manager to add more.