Updated on 2026-08-14

core/utils/src/main/java/com/tangem/utils/SupportedLanguages.kt

@@ -13,7 +13,7 @@ object SupportedLanguages {
     const val CHINESE = "zh"
     const val SPANISH = "es"
 
-    val supportedLangugeCodes = listOf(
+    val supportedLanguageCodes = listOf(
         ENGLISH,
         RUSSIAN,
         GERMAN,
@@ -25,10 +25,17 @@ object SupportedLanguages {
         SPANISH,
     )
 
+    /**
+     * Returns the ISO 639-1 code of the device's current language when it belongs to
+     * [supportedLanguageCodes], otherwise falls back to [ENGLISH].
+     *
+     * Intended for callers that need a plain two-letter language code (e.g. URL path segments
+     * like `tangem.com/{en|ru}/...`).
+     */
     fun getCurrentSupportedLanguageCode(): String {
         val locale = Locale.getDefault()
 
-        return if (supportedLangugeCodes.contains(locale.language)) {
+        return if (supportedLanguageCodes.contains(locale.language)) {
             locale.language
         } else {
             ENGLISH

core/utils/src/main/java/com/tangem/utils/TangemBlogUrlBuilder.kt

@@ -1,28 +0,0 @@
-package com.tangem.utils
-
-import java.util.Locale
-
-@Deprecated("Use TangemBlogUrlBuilder from common module")
-object TangemBlogUrlBuilder {
-
-    private const val RU_LOCALE = "ru"
-    private const val EN_LOCALE = "en"
-
-    private const val TANGEM_MAIN = "https://tangem.com/"
-
-    val FEE_BLOG_LINK: String
-        get(): String {
-            val locale = if (Locale.getDefault().language == RU_LOCALE) RU_LOCALE else EN_LOCALE
-            return buildString {
-                append(TANGEM_MAIN)
-                append(locale)
-                append("/blog/post/what-is-a-transaction-fee-and-why-do-we-need-it/")
-            }
-        }
-
-    const val RESOURCE_TO_LEARN_ABOUT_APPROVING_IN_SWAP = "https://tangem.com/en/blog/post/give-revoke-permission/"
-
-    const val YIELD_SUPPLY_HOW_IT_WORKS_URL = "https://tangem.com/en/blog/post/yield-mode"
-    const val YIELD_SUPPLY_TOS_URL = "https://aave.com/terms-of-service"
-    const val YIELD_SUPPLY_PRIVACY_URL = "https://aave.com/privacy-policy"
-}

core/utils/src/test/kotlin/com/tangem/utils/SupportedLanguagesTest.kt

@@ -0,0 +1,94 @@
+package com.tangem.utils
+
+import com.google.common.truth.Truth
+import org.junit.jupiter.api.AfterEach
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.TestInstance
+import java.util.Locale
+
+@TestInstance(TestInstance.Lifecycle.PER_CLASS)
+class SupportedLanguagesTest {
+
+    private lateinit var originalLocale: Locale
+
+    @BeforeEach
+    fun setUp() {
+        originalLocale = Locale.getDefault()
+    }
+
+    @AfterEach
+    fun tearDown() {
+        Locale.setDefault(originalLocale)
+    }
+
+    @Test
+    fun `getCurrentSupportedLanguageCode returns primary language when locale is supported`() {
+        // Arrange
+        Locale.setDefault(Locale("en", "US"))
+
+        // Act
+        val actual = SupportedLanguages.getCurrentSupportedLanguageCode()
+
+        // Assert
+        Truth.assertThat(actual).isEqualTo("en")
+    }
+
+    @Test
+    fun `getCurrentSupportedLanguageCode drops region for supported language`() {
+        // Arrange
+        Locale.setDefault(Locale("zh", "CN"))
+
+        // Act
+        val actual = SupportedLanguages.getCurrentSupportedLanguageCode()
+
+        // Assert
+        Truth.assertThat(actual).isEqualTo("zh")
+    }
+
+    @Test
+    fun `getCurrentSupportedLanguageCode returns ENGLISH when locale is not supported`() {
+        // Arrange — pt (Portuguese) is not in supportedLanguageCodes
+        Locale.setDefault(Locale("pt", "BR"))
+
+        // Act
+        val actual = SupportedLanguages.getCurrentSupportedLanguageCode()
+
+        // Assert
+        Truth.assertThat(actual).isEqualTo(SupportedLanguages.ENGLISH)
+    }
+
+    @Test
+    fun `getCurrentSupportedLanguageCode returns ENGLISH for empty language`() {
+        // Arrange
+        Locale.setDefault(Locale("", ""))
+
+        // Act
+        val actual = SupportedLanguages.getCurrentSupportedLanguageCode()
+
+        // Assert
+        Truth.assertThat(actual).isEqualTo(SupportedLanguages.ENGLISH)
+    }
+
+    @Test
+    fun `getCurrentSupportedLanguageCode supports every code in supportedLanguageCodes`() {
+        SupportedLanguages.supportedLanguageCodes.forEach { code ->
+            // Arrange
+            Locale.setDefault(Locale(code))
+
+            // Act
+            val actual = SupportedLanguages.getCurrentSupportedLanguageCode()
+
+            // Assert
+            Truth.assertThat(actual).isEqualTo(code)
+        }
+    }
+
+    @Test
+    fun `supportedLanguageCodes contains the expected nine ISO 639-1 codes`() {
+        // Assert
+        Truth.assertThat(SupportedLanguages.supportedLanguageCodes)
+            .containsExactly("en", "ru", "de", "fr", "it", "ja", "uk", "zh", "es")
+            .inOrder()
+    }
+}