diff --git a/platform/get_text_by_id.cpp b/platform/get_text_by_id.cpp
index f2e48e8e49..d382787890 100644
--- a/platform/get_text_by_id.cpp
+++ b/platform/get_text_by_id.cpp
@@ -37,6 +37,7 @@ GetTextById::GetTextById(TextSource textSouce, string const & localeName)
   string const pathToJson = my::JoinFoldersToPath(
       {GetTextSourceString(textSouce), localeName + ".json"}, "localize.json");
 
+  // @TODO(vbykoianko) Add assert if locale path pathToJson is not valid.
   string jsonBuffer;
   ReaderPtr<Reader>(GetPlatform().GetReader(pathToJson)).ReadAsString(jsonBuffer);
 
@@ -66,14 +67,14 @@ GetTextById::GetTextById(TextSource textSouce, string const & localeName)
   ASSERT_EQUAL(m_localeTexts.size(), json_object_size(root.get()), ());
 }
 
-string GetTextById::operator()(string const & textId) const
+pair<string, bool> GetTextById::operator()(string const & textId) const
 {
   if (!IsValid())
-    return textId;
+    return make_pair(textId, false);
 
   auto const textIt = m_localeTexts.find(textId);
   if (textIt == m_localeTexts.end())
-    return textId;
-  return textIt->second;
+    return make_pair(textId, false);
+  return make_pair(textIt->second, true);
 }
 }  // namespace platform
diff --git a/platform/get_text_by_id.hpp b/platform/get_text_by_id.hpp
index c018e7ec84..b70bac0cec 100644
--- a/platform/get_text_by_id.hpp
+++ b/platform/get_text_by_id.hpp
@@ -1,7 +1,8 @@
 #pragma once
 
-#include <std/string.hpp>
-#include <std/unordered_map.hpp>
+#include "std/string.hpp"
+#include "std/unordered_map.hpp"
+#include "std/utility.hpp"
 
 namespace platform
 {
@@ -20,7 +21,10 @@ public:
   GetTextById(TextSource textSouce, string const & localeName);
 
   bool IsValid() const { return !m_localeTexts.empty(); }
-  string operator()(string const & textId) const;
+  /// @return a pair of a text string in a specified locale for textId and a boolean flag.
+  /// If textId is found in m_localeTexts then the boolean flag is set to true.
+  /// The boolean flag is set to false otherwise.
+  pair<string, bool> operator()(string const & textId) const;
 
 private:
   unordered_map<string, string> m_localeTexts;
diff --git a/platform/platform_tests/get_text_by_id_tests.cpp b/platform/platform_tests/get_text_by_id_tests.cpp
index 657669a11d..e9a7df4bf9 100644
--- a/platform/platform_tests/get_text_by_id_tests.cpp
+++ b/platform/platform_tests/get_text_by_id_tests.cpp
@@ -7,49 +7,69 @@ using namespace platform;
 UNIT_TEST(GetTextByIdEnglishTest)
 {
   platform::GetTextById getEnglish(TextSource::TtsSound, "en");
-  TEST_EQUAL(getEnglish("make_a_slight_right_turn"), "Make a slight right turn.", ());
-  TEST_EQUAL(getEnglish("in_900_meters"), "In 900 meters.", ());
-  TEST_EQUAL(getEnglish("then"), "Then.", ());
-  TEST_EQUAL(getEnglish("in_1_mile"), "In one mile.", ());
-  TEST_EQUAL(getEnglish("some_nonexistent_key"), "some_nonexistent_key", ());
+  TEST_EQUAL(getEnglish("make_a_slight_right_turn").first, "Make a slight right turn.", ());
+  TEST_EQUAL(getEnglish("in_900_meters").first, "In 900 meters.", ());
+  TEST_EQUAL(getEnglish("then").first, "Then.", ());
+  TEST_EQUAL(getEnglish("in_1_mile").first, "In one mile.", ());
+
+  TEST_EQUAL(getEnglish("some_nonexistent_key").first, "some_nonexistent_key", ());
+  TEST(!getEnglish("some_nonexistent_key").second, ());
+  TEST(!getEnglish("").second, ());
+  TEST(!getEnglish(" ").second, ());
 }
 
 UNIT_TEST(GetTextByIdRussianTest)
 {
   platform::GetTextById getRussian(TextSource::TtsSound, "ru");
-  TEST_EQUAL(getRussian("in_800_meters"), "Через 800 метров.", ());
-  TEST_EQUAL(getRussian("make_a_slight_right_turn"), "Плавный поворот направо.", ());
-  TEST_EQUAL(getRussian("take_the_6th_exit"), "6-й поворот с кольца.", ());
-  TEST_EQUAL(getRussian("in_1_mile"), "Через одну милю.", ());
-  TEST_EQUAL(getRussian("some_nonexistent_key"), "some_nonexistent_key", ());
+  TEST_EQUAL(getRussian("in_800_meters").first, "Через 800 метров.", ());
+  TEST_EQUAL(getRussian("make_a_slight_right_turn").first, "Плавный поворот направо.", ());
+  TEST_EQUAL(getRussian("take_the_6th_exit").first, "6-й поворот с кольца.", ());
+  TEST_EQUAL(getRussian("in_1_mile").first, "Через одну милю.", ());
+
+  TEST_EQUAL(getRussian("some_nonexistent_key").first, "some_nonexistent_key", ());
+  TEST(!getRussian("some_nonexistent_key").second, ());
+  TEST(!getRussian("").second, ());
+  TEST(!getRussian(" ").second, ());
 }
 
 UNIT_TEST(GetTextByIdKoreanTest)
 {
   platform::GetTextById getKorean(TextSource::TtsSound, "ko");
-  TEST_EQUAL(getKorean("in_700_meters"), "700 미터 앞", ());
-  TEST_EQUAL(getKorean("make_a_right_turn"), "우회전입니다.", ());
-  TEST_EQUAL(getKorean("take_the_5th_exit"), "다섯 번째 출구입니다.", ());
-  TEST_EQUAL(getKorean("in_5000_feet"), "5000피트 앞", ());
-  TEST_EQUAL(getKorean("some_nonexistent_key"), "some_nonexistent_key", ());
+  TEST_EQUAL(getKorean("in_700_meters").first, "700 미터 앞", ());
+  TEST_EQUAL(getKorean("make_a_right_turn").first, "우회전입니다.", ());
+  TEST_EQUAL(getKorean("take_the_5th_exit").first, "다섯 번째 출구입니다.", ());
+  TEST_EQUAL(getKorean("in_5000_feet").first, "5000피트 앞", ());
+
+  TEST_EQUAL(getKorean("some_nonexistent_key").first, "some_nonexistent_key", ());
+  TEST(!getKorean("some_nonexistent_key").second, ());
+  TEST(!getKorean("").second, ());
+  TEST(!getKorean(" ").second, ());
 }
 
 UNIT_TEST(GetTextByIdArabicTest)
 {
   platform::GetTextById getArabic(TextSource::TtsSound, "ar");
-  TEST_EQUAL(getArabic("in_1_kilometer"), "بعد كيلو متر واحدٍ", ());
-  TEST_EQUAL(getArabic("leave_the_roundabout"), "اخرج من الطريق الدوار", ());
-  TEST_EQUAL(getArabic("take_the_3rd_exit"), "اسلك المخرج الثالث", ());
-  TEST_EQUAL(getArabic("in_4000_feet"), "بعد 4000 قدم", ());
-  TEST_EQUAL(getArabic("some_nonexistent_key"), "some_nonexistent_key", ());
+  TEST_EQUAL(getArabic("in_1_kilometer").first, "بعد كيلو متر واحدٍ", ());
+  TEST_EQUAL(getArabic("leave_the_roundabout").first, "اخرج من الطريق الدوار", ());
+  TEST_EQUAL(getArabic("take_the_3rd_exit").first, "اسلك المخرج الثالث", ());
+  TEST_EQUAL(getArabic("in_4000_feet").first, "بعد 4000 قدم", ());
+
+  TEST_EQUAL(getArabic("some_nonexistent_key").first, "some_nonexistent_key", ());
+  TEST(!getArabic("some_nonexistent_key").second, ());
+  TEST(!getArabic("").second, ());
+  TEST(!getArabic(" ").second, ());
 }
 
 UNIT_TEST(GetTextByIdFrenchTest)
 {
   platform::GetTextById getFrench(TextSource::TtsSound, "fr");
-  TEST_EQUAL(getFrench("in_1_5_kilometers"), "Dans un virgule cinq kilomètre.", ());
-  TEST_EQUAL(getFrench("enter_the_roundabout"), "Prenez le rond-point.", ());
-  TEST_EQUAL(getFrench("take_the_2nd_exit"), "Prenez la deuxième sortie.", ());
-  TEST_EQUAL(getFrench("in_3500_feet"), "Dans 3500 feet.", ());
-  TEST_EQUAL(getFrench("some_nonexistent_key"), "some_nonexistent_key", ());
+  TEST_EQUAL(getFrench("in_1_5_kilometers").first, "Dans un virgule cinq kilomètre.", ());
+  TEST_EQUAL(getFrench("enter_the_roundabout").first, "Prenez le rond-point.", ());
+  TEST_EQUAL(getFrench("take_the_2nd_exit").first, "Prenez la deuxième sortie.", ());
+  TEST_EQUAL(getFrench("in_3500_feet").first, "Dans 3500 feet.", ());
+
+  TEST_EQUAL(getFrench("some_nonexistent_key").first, "some_nonexistent_key", ());
+  TEST(!getFrench("some_nonexistent_key").second, ());
+  TEST(!getFrench("").second, ());
+  TEST(!getFrench(" ").second, ());
 }