注意文件有编码个和结尾字符，Windows和Linux不太一样，解析处理的中文可能乱码或者结尾符号无法截断正常解析，下面就是csv文件的文本打开

ResID,Chinese_Simplified,Chinese_Traditional,Japanese,Korean,English
1,启用,較佳,望ましい,??,Enable
2,光电探头信号,一般,一般,??,Photoelectric probe signal
3,外接信号,經濟,経済,??,External signal
4,识别(读码)结果:,強烈,ストロング,??,Recognition (code reading) result:
5,生产线速度,一般,一般,??,Production line speed
6,相机型号:,柔和,ソフト,???,Camera model:

我随便填写的文字不要在，程序可能有漏洞

其实用一个lan.csv文件, Excel文件编辑一下就行了，新语言就增加一列，新增翻译就往下添加行 

 解析csv文件1...6...n就获取一行的语言，首先指定英语项，在使用id拿到英文

下面代码运行的结果

Chinese_Simplified, Chinese_Traditional, Japanese, Korean, English,
启用
光电探头信号
外接信号
识别(读码)结果:
生产线速度
Chinese_Simplified, Chinese_Traditional, Japanese, Korean, English,
Enable
Photoelectric probe signal
External signal
Recognition (code reading) result:
Production line speed

#include <iostream>
#include <istream>
#include <streambuf>
#include <fstream>
#include <sstream>
#include <vector>
#include <string>
#include <stdlib.h>
#include <map>
#include <list>

class multilingual_manage
{
public:
    multilingual_manage();
    ~multilingual_manage();

    static int init_language_res(const std::string &lan);
    static std::string get_language_content(const std::string& id);
    static std::list<std::string> get_multilingual_name() {
        return multilingual;
    }

private:
    static void read_language_content(std::ifstream& csv_data, const std::string& lan);

private:
    static std::map<std::string/*id*/, std::string/*text*/> languages;
    static std::list<std::string> multilingual;
};

std::map<std::string/*id*/, std::string/*text*/> multilingual_manage::languages;
std::list<std::string> multilingual_manage::multilingual;

multilingual_manage::multilingual_manage()
{
}

multilingual_manage::~multilingual_manage()
{
}

void multilingual_manage::read_language_content(std::ifstream &csv_data, const std::string &lan)
{
    std::string word;
    std::string line;
    std::istringstream sin;//将整行字符串line读入到字符串istringstream中
    int currentLanIndex = -1;

    // 读取数据
    std::string lanId = "";        
    unsigned int rows = 0;//行
    unsigned int columns = 0;//列
    while (std::getline(csv_data, line))
    {
        rows++;
        columns = 0;
        sin.clear();
        sin.str(line);
        while (std::getline(sin, word, ',')) //将字符串流sin中的字符读到field字符串中，以逗号为分隔符
        {
            columns++;
            //加入当前列的语言
            if (columns == currentLanIndex) {
                //std::cout << word << "  ";
                languages.emplace(std::pair<std::string/*id*/, std::string/*text*/>(lanId, word));
            }
            //获取语言文本对应的id
            if ((columns==1)&&(rows!=1)) {
                lanId = word;
                //std::cout << word << "  ";
            }
            //获取所有语言
            if ((rows==1)&&(columns!=1)) {
                multilingual.push_back(word);
                //找到当前语言所在列
                if (word == lan) {
                    currentLanIndex = columns;
                }
            }
			//std::cout << rows << "," << columns << std::endl;
        }
    }
}

std::string multilingual_manage::get_language_content(const std::string &id)
{
    std::map<std::string/*id*/, std::string/*text*/>::iterator iter = languages.find(id);
    if (iter != languages.end()) {
		return iter->second;
    }
    return "@#";//未翻译
}

#define LANGUAGE_RES_ID(__id__)  multilingual_manage::get_language_content(__id__)

#define DEF_LANG_Enable_Use2    LANGUAGE_RES_ID("1") //QObject::tr("启用")
#define DEF_LANG_Vision_Photoelectric_Probe2 LANGUAGE_RES_ID("2") //QObject::tr("光电探头信号")
#define DEF_LANG_Vision_External_Signal3 LANGUAGE_RES_ID("3") //QObject::tr("外接信号")
#define DEF_LANG_Vision_Recognition_Result2 LANGUAGE_RES_ID("4") //QObject::tr("识别(读码)结果:")
#define DEF_LANG_Production_Line_Speed2 LANGUAGE_RES_ID("5") //QObject::tr("生产线速度")
#define DEF_LANG_Camera_Model2 LANGUAGE_RES_ID("6") //QObject::tr("相机型号:")

int multilingual_manage::init_language_res(const std::string& lan)
{
    languages.clear();
    multilingual.clear();
    std::ifstream csv_data("lan.csv"/*文件名你自己的就好*/, std::ios::in);
    std::string line;

    if (!csv_data.is_open())
    {
        std::cout << "Error: opening file fail" << std::endl;
        std::exit(1);
    }

    std::istringstream sin;         
    std::vector<std::string> words;
    std::string word;

    // 读取
    read_language_content(csv_data, lan);

    std::list<std::string>::const_iterator citer = multilingual.cbegin();
    for (; citer != multilingual.cend(); citer++)
    {
        std::cout << *citer << ", ";
    }
    std::cout << std::endl;

    std::cout << DEF_LANG_Enable_Use2 << std::endl;
    std::cout << DEF_LANG_Vision_Photoelectric_Probe2 << std::endl;
    std::cout << DEF_LANG_Vision_External_Signal3 << std::endl;
    std::cout << DEF_LANG_Vision_Recognition_Result2 << std::endl;
    std::cout << DEF_LANG_Production_Line_Speed2 << std::endl;

    csv_data.close();
    return 0;
}

int main()
{
    multilingual_manage::init_language_res("Chinese_Simplified");
    multilingual_manage::init_language_res("English");
    return 0;
}