FT2Font::LanguageType languages;
if (auto value = std::get_if<FT2Font::LanguageType>(&languages_or_str)) {
    languages = std::move(*value);
} else if (auto value = std::get_if<std::string>(&languages_or_str)) {
    languages = std::vector<FT2Font::LanguageRange>{
        FT2Font::LanguageRange{*value, 0, text.size()}
    };
} else {
    // NOTE: this can never happen as pybind11 would have checked the type in the
    // Python wrapper before calling this function, but we need to keep the
    // std::get_if instead of std::get for macOS 10.12 compatibility.
    throw py::type_error("languages must be str or list of tuple");
}

FT2Font::LanguageType languages;
if (std::holds_alternative<FT2Font::LanguageType>(languages_or_str)) {
    languages = std::move(std::get<FT2Font::LanguageType>(languages_or_str));
} else {
    languages = std::vector<FT2Font::LanguageRange>{
        FT2Font::LanguageRange{std::get<std::string>(languages_or_str), 0, text.size()}
    };
}