Repo created

libs/platform/preferred_languages.hpp

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+#pragma once
+
+#include "base/buffer_vector.hpp"
+
+#include <string>
+
+namespace languages
+{
+/// @note These functions are heavy enough to call them often. Be careful.
+
+/// @return List of original system languages in the form "en-US|ru-RU|es|zh-Hant".
+std::string GetPreferred();
+
+/// @return Original language code for the current user in the form "en-US", "zh-Hant".
+std::string GetCurrentOrig();
+
+/// @return Current language in out Twine translations compatible format, e.g. "en", "pt" or "zh-Hant".
+std::string GetCurrentTwine();
+std::string GetCurrentMapTwine();
+
+/// @return Normalized language code for the current user in the form "en", "zh".
+/// Returned languages are normalized to our supported languages in the core, see
+/// string_utf8_multilang.cpp and should not be used with any sub-locales like zh-Hans/zh-Hant. Some
+/// langs like Danish (da) are not supported in the core too, but used as a locale.
+std::string Normalize(std::string_view lang);
+std::string GetCurrentNorm();
+std::string GetCurrentMapLanguage();
+std::vector<int8_t> GetPreferredLangIndexes();
+
+buffer_vector<std::string, 4> const & GetSystemPreferred();
+}  // namespace languages