the problem with translation using gettext technology

Question

While doing coursework at the university, I had a task to output the entered number in text format and translate this program using gettext technology. Everything is compiled, but the program outputs the tap response incorrectly.

Using Windows 11, VS.
The code is presented below

#define _CRT_SECURE_NO_WARNINGS
#define ENABLE_NLS
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libintl.h>
#include <locale.h>
#include <windows.h>
#define MAX_LEN_STRING_NUMBER 6
#define _(String) gettext(String)
#define PACKAGE "kursovaya"
#define LOCALEDIR "locale"


struct numbers
{
    char num[30];
};

struct declensions
{
    char numDeclensions[30];
};

struct words
{
    char word[30];
};

struct numbersFromTenToNineteen
{
    char numNumbersFromTenToNineteen[30];
};

struct rubel
{
    char rub[30];
};


int main()
{
    setlocale(LC_ALL, "");
    bindtextdomain("kursovaya", "locale");
    //bind_textdomain_codeset(PACKAGE, "CP1251");
    textdomain("kursovaya");
    size_t endInputNunber;
    struct numbers num[] = { {""}, {_("one ")}, {_("two ")}, {_("three ")}, {_("four ")}, {_("five ")}, {_("six ")}, {_("seven ")}, {_("eight ")}, {_("nine ")} };
    struct words word[] = { {_("thousands ")}, {_("hundreds ")}, {_("dozens ")} };
    struct declensions numDeclensions[] = { {""}, {""}, {_("twenty ")}, {_("thirty ")}, {_("forty ")}, {_("fifty ")}, {_("sixty ")}, {_("seventy ")}, {_("eighty ")}, {_("ninety ")} };
    struct numbersFromTenToNineteen numNumbersFromTenToNineteen[] = { {_("ten")}, {_("eleven")}, {_("twelve")}, {_("thirteen")}, {_("fourteen")}, {_("fifteen")}, {_("sixteen")}, {_("seventeen")}, {_("eighteen")}, {_("nineteen")} };
    struct rubel rub[] = { {_("rubel ")}, {_("rubels ")}, {_("rurubels")} };
    char inputNumber[MAX_LEN_STRING_NUMBER] = { '\0' };
    char outputStringNumber[300];
    char variableJinFor;
    char variableJinForNumbersFromTenToNineteen;
    int lenInputNumber = 0;
    int digitOfTheNumber;
    int workWhile = 20;
    int next;

    outputStringNumber[0] = '\0';

    while (1)
    {
        scanf_s("%d", &next);
        while ((getchar()) != '\n');

        system("cls");

        switch (next)
        {
        case 1:
            puts(_("enter a number from 0 to 9999"));
            fgets(inputNumber, MAX_LEN_STRING_NUMBER, stdin);

            endInputNunber = strlen(inputNumber);
            if (inputNumber[endInputNunber - 1] == '\n')
                inputNumber[endInputNunber - 1] = '\0';

            for (int i = 0; i < endInputNunber; i++)
                if (inputNumber[i] != '\0')
                    lenInputNumber++;

            digitOfTheNumber = lenInputNumber;

            while (digitOfTheNumber > 0)
                for (int i = 0; i < lenInputNumber; i++)
                {
                    for (int j = 0; j < 10; j++)
                    {
                        variableJinFor = j + '0';
                        if (inputNumber[i] == variableJinFor)
                        {
                            if (digitOfTheNumber == 4)
                            {
                                strcat(outputStringNumber, num[j].num);
                                strcat(outputStringNumber, word[i].word);
                            }
                            if (digitOfTheNumber == 3)
                            {
                                strcat(outputStringNumber, num[j].num);
                                strcat(outputStringNumber, word[1].word);
                            }
                            if (digitOfTheNumber == 2)
                            {
                                if (inputNumber[0] == '1' && lenInputNumber < 3)
                                {
                                    for (int n = 0; n < 10; n++)
                                    {
                                        variableJinForNumbersFromTenToNineteen = n + '0';
                                        if (inputNumber[1] == variableJinForNumbersFromTenToNineteen)
                                            strcat(outputStringNumber, numNumbersFromTenToNineteen[n].numNumbersFromTenToNineteen);
                                    }
                                    digitOfTheNumber = 0;
                                }
                                else
                                    strcat(outputStringNumber, numDeclensions[j].numDeclensions);
                            }
                            if (digitOfTheNumber == 1)
                                strcat(outputStringNumber, num[j].num);
                            if (inputNumber[0] == '0')
                                strcat(outputStringNumber, _("zero"));
                        }
                    }
                    digitOfTheNumber--;
                }
            if (inputNumber[endInputNunber] == '1' || inputNumber[endInputNunber] == '0')
                strcat(outputStringNumber, rub[0].rub);
            else
                strcat(outputStringNumber, rub[1].rub);
            
            puts(outputStringNumber);

            printf("%s", num[1].num);

            puts(_("press any key to continue"));
            getchar();
            break;
        case 2:
            //fgets(inputNumber, MAX_LEN_STRING_NUMBER, mass); /*это так не работает*/

            endInputNunber = strlen(inputNumber);
            if (inputNumber[endInputNunber - 1] == '\n')
                inputNumber[endInputNunber - 1] = '\0';

            for (int i = 0; i < endInputNunber; i++)
                if (inputNumber[i] != '\0')
                    lenInputNumber++;

            digitOfTheNumber = lenInputNumber;

            while (digitOfTheNumber > 0)
                for (int i = 0; i < lenInputNumber; i++)
                {
                    for (int j = 0; j < 10; j++)
                    {
                        variableJinFor = j + '0';
                        if (inputNumber[i] == variableJinFor)
                        {
                            if (digitOfTheNumber == 4)
                            {
                                strcat(outputStringNumber, num[j].num);
                                strcat(outputStringNumber, word[i].word);
                            }
                            if (digitOfTheNumber == 3)
                            {
                                strcat(outputStringNumber, num[j].num);
                                strcat(outputStringNumber, word[1].word);
                            }
                            if (digitOfTheNumber == 2)
                            {
                                if (inputNumber[0] == '1' && lenInputNumber < 3)
                                {
                                    for (int n = 0; n < 10; n++)
                                    {
                                        variableJinForNumbersFromTenToNineteen = n + '0';
                                        if (inputNumber[1] == variableJinForNumbersFromTenToNineteen)
                                            strcat(outputStringNumber, numNumbersFromTenToNineteen[n].numNumbersFromTenToNineteen);
                                    }
                                    digitOfTheNumber = 0;
                                }
                                else
                                    strcat(outputStringNumber, numDeclensions[j].numDeclensions);
                            }
                            if (digitOfTheNumber == 1)
                                strcat(outputStringNumber, num[j].num);
                            if (inputNumber[0] == '0')
                                strcat(outputStringNumber, _("zero"));
                        }
                    }
                    digitOfTheNumber--;
                }
            if (inputNumber[endInputNunber] == '1' || inputNumber[endInputNunber] == '0')
                strcat(outputStringNumber, rub[0].rub);
            else
                strcat(outputStringNumber, rub[1].rub);
            puts(outputStringNumber);

            puts(_("press any key to continue"));
            getchar();
            break;
        case 3:
            return 0;
            break;
        }
    }
}

Internet searches and questions to the neural network were unsuccessful. there were attempts to change the encoding, but they didn't help either

I present the minimum working code that works in English

#define _CRT_SECURE_NO_WARNINGS
#define ENABLE_NLS
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libintl.h>
#include <locale.h>
#include <windows.h>
#define MAX_LEN_STRING_NUMBER 6
#define _(String) gettext(String)
#define PACKAGE "kursovaya"
#define LOCALEDIR "locale"


struct numbers
{
    char num[30];
};

struct declensions
{
    char numDeclensions[30];
};

struct words
{
    char word[30];
};

struct numbersFromTenToNineteen
{
    char numNumbersFromTenToNineteen[30];
};

struct rubel
{
    char rub[30];
};


int main()
{
    setlocale(LC_ALL, "");
    bindtextdomain("kursovaya", "locale");
    
    textdomain("kursovaya");
    //bind_textdomain_codeset("kursovaya", "UTF-8");
    size_t endInputNunber;
    struct numbers num[] = { {""}, {_("one ")}, {_("two ")}, {_("three ")}, {_("four ")}, {_("five ")}, {_("six ")}, {_("seven ")}, {_("eight ")}, {_("nine ")} };
    struct words word[] = { {_("thousands ")}, {_("hundreds ")}, {_("dozens ")} };
    struct declensions numDeclensions[] = { {""}, {""}, {_("twenty ")}, {_("thirty ")}, {_("forty ")}, {_("fifty ")}, {_("sixty ")}, {_("seventy ")}, {_("eighty ")}, {_("ninety ")} };
    struct numbersFromTenToNineteen numNumbersFromTenToNineteen[] = { {_("ten")}, {_("eleven")}, {_("twelve")}, {_("thirteen")}, {_("fourteen")}, {_("fifteen")}, {_("sixteen")}, {_("seventeen")}, {_("eighteen")}, {_("nineteen")} };
    struct rubel rub[] = { {_("rubel ")}, {_("rubels ")}, {_("rurubels")} };
    char inputNumber[MAX_LEN_STRING_NUMBER] = { '\0' };
    char outputStringNumber[300];
    char variableJinFor;
    char variableJinForNumbersFromTenToNineteen;
    int lenInputNumber = 0;
    int digitOfTheNumber;
    int workWhile = 20;
    int next;

    outputStringNumber[0] = '\0';


    while (1)
    {
        scanf_s("%d", &next);
        while ((getchar()) != '\n');

        system("cls");

        switch (next)
        {
        case 1:
            puts(_("enter a number from 0 to 9999"));
            fgets(inputNumber, MAX_LEN_STRING_NUMBER, stdin);

            endInputNunber = strlen(inputNumber);
            if (inputNumber[endInputNunber - 1] == '\n')
                inputNumber[endInputNunber - 1] = '\0';

            for (int i = 0; i < endInputNunber; i++)
                if (inputNumber[i] != '\0')
                    lenInputNumber++;

            digitOfTheNumber = lenInputNumber;

            while (digitOfTheNumber > 0)
                for (int i = 0; i < lenInputNumber; i++)
                {
                    for (int j = 0; j < 10; j++)
                    {
                        variableJinFor = j + '0';
                        if (inputNumber[i] == variableJinFor)
                        {
                            if (digitOfTheNumber == 4)
                            {
                                strcat(outputStringNumber, num[j].num);
                                strcat(outputStringNumber, word[i].word);
                            }
                            if (digitOfTheNumber == 3)
                            {
                                strcat(outputStringNumber, num[j].num);
                                strcat(outputStringNumber, word[1].word);
                            }
                            if (digitOfTheNumber == 2)
                            {
                                if (inputNumber[0] == '1' && lenInputNumber < 3)
                                {
                                    for (int n = 0; n < 10; n++)
                                    {
                                        variableJinForNumbersFromTenToNineteen = n + '0';
                                        if (inputNumber[1] == variableJinForNumbersFromTenToNineteen)
                                            strcat(outputStringNumber, numNumbersFromTenToNineteen[n].numNumbersFromTenToNineteen);
                                    }
                                    digitOfTheNumber = 0;
                                }
                                else
                                    strcat(outputStringNumber, numDeclensions[j].numDeclensions);
                            }
                            if (digitOfTheNumber == 1)
                                strcat(outputStringNumber, num[j].num);
                            if (inputNumber[0] == '0')
                                strcat(outputStringNumber, _("zero"));
                        }
                    }
                    digitOfTheNumber--;
                }
            if (inputNumber[endInputNunber] == '1' || inputNumber[endInputNunber] == '0')
                strcat(outputStringNumber, rub[0].rub);
            else
                strcat(outputStringNumber, rub[1].rub);
            
            puts(outputStringNumber);

            printf("%s", num[1].num);

            puts(_("press any key to continue"));
            getchar();