diff --git a/09_I18nL10n/Makefile b/09_I18nL10n/Makefile
new file mode 100644
index 0000000..00532ff
--- /dev/null
+++ b/09_I18nL10n/Makefile
@@ -0,0 +1,24 @@
+CFLAGS = -Wall -Wextra -std=c99 -g
+CPPFLAGS = -I.
+LDFLAGS =
+
+EXEC = main
+
+all: $(EXEC) po/ru/$(EXEC).mo
+
+$(EXEC): $(EXEC).c 
+	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ $< $(LDFLAGS)
+
+po/ru/$(EXEC).mo: po/ru/$(EXEC).po
+	msgfmt --output-file=$@ $<
+
+po/ru/$(EXEC).po: po/$(EXEC).pot
+	msgmerge --update $@ $<
+
+po/$(EXEC).pot: $(EXEC).c
+	xgettext -k_ -j -lC -c -s -o po/main.pot main.c
+
+clean:
+	@rm -f $(EXEC) po/ru/*.mo *~
+
+.PHONY: clean
\ No newline at end of file
diff --git a/09_I18nL10n/main.c b/09_I18nL10n/main.c
new file mode 100644
index 0000000..7f9179b
--- /dev/null
+++ b/09_I18nL10n/main.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <libintl.h>
+#include <locale.h>
+
+#define _(STRING) gettext(STRING)
+
+int main() {
+    setlocale (LC_ALL, "");
+    bindtextdomain ("al_main", "."
+    //getenv("PWD")
+    );
+    textdomain ("al_main");
+
+    printf(_("Choose integer x that 1 <= x <= 100\n"));
+    int begin = 1;
+    int end = 100 + 1;
+    while (end - begin > 1)
+    {
+        int cur = (begin + end) / 2;
+        printf(_("Please choose correct statement:\n"));
+        printf("1: x < %d\n", cur);
+        printf("2: x >= %d\n", cur);
+        int user_input;
+        scanf("%d", &user_input);
+        if ( user_input == 1 ){
+            end = cur;
+        } else {
+            begin = cur;
+        }
+    }
+    printf(_("Your number is: %d\n"), begin);
+    return 0;
+}
\ No newline at end of file
diff --git a/09_I18nL10n/po/main.pot b/09_I18nL10n/po/main.pot
new file mode 100644
index 0000000..f8a0ecb
--- /dev/null
+++ b/09_I18nL10n/po/main.pot
@@ -0,0 +1,33 @@
+# SOME DESCRIPTIVE TITLE.
+# Copyright (C) YEAR THE PACKAGE'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the PACKAGE package.
+# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
+#
+#, fuzzy
+msgid ""
+msgstr ""
+"Project-Id-Version: PACKAGE VERSION\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2020-11-14 18:54+0300\n"
+"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
+"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+"Language-Team: LANGUAGE <LL@li.org>\n"
+"Language: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+
+#: main.c:12 main.c:16
+#, c-format
+msgid "Choose integer x that 1 <= x <= 100\n"
+msgstr ""
+
+#: main.c:18 main.c:22
+#, c-format
+msgid "Please choose correct statement:\n"
+msgstr ""
+
+#: main.c:29 main.c:33
+#, c-format
+msgid "Your number is: %d\n"
+msgstr ""
diff --git a/09_I18nL10n/po/ru/main.po b/09_I18nL10n/po/ru/main.po
new file mode 100644
index 0000000..51ff12f
--- /dev/null
+++ b/09_I18nL10n/po/ru/main.po
@@ -0,0 +1,34 @@
+# Russian translations for I18nL10n package.
+# Copyright (C) 2020 THE I18nL10n'S COPYRIGHT HOLDER
+# This file is distributed under the same license as the I18nL10n package.
+# Aleksey Lobanov <alex_cmc@likemath.ru>, 2020.
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: I18nL10n 0.1\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2020-11-14 18:54+0300\n"
+"PO-Revision-Date: 2020-11-14 18:01+0300\n"
+"Last-Translator: Aleksey Lobanov <alex_cmc@likemath.ru>\n"
+"Language-Team: Russian\n"
+"Language: ru_RU\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n"
+"%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
+
+#: main.c:12 main.c:16
+#, c-format
+msgid "Choose integer x that 1 <= x <= 100\n"
+msgstr "Выберите целое число x, что 1 <= x <= 100\n"
+
+#: main.c:18 main.c:22
+#, c-format
+msgid "Please choose correct statement:\n"
+msgstr "Пожалуйста, выберите верное утверждение:\n"
+
+#: main.c:29 main.c:33
+#, c-format
+msgid "Your number is: %d\n"
+msgstr "Ваше число: %d\n"
diff --git a/09_I18nL10n/ru/LC_MESSAGES/main.mo b/09_I18nL10n/ru/LC_MESSAGES/main.mo
new file mode 100644
index 0000000..ad5f67e
Binary files /dev/null and b/09_I18nL10n/ru/LC_MESSAGES/main.mo differ