diff --git a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/abstracts/WithLanguageCode.kt b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/abstracts/WithOptionalLanguageCode.kt
similarity index 58%
rename from tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/abstracts/WithLanguageCode.kt
rename to tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/abstracts/WithOptionalLanguageCode.kt
index 69ca09b516..125cb17826 100644
--- a/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/abstracts/WithLanguageCode.kt
+++ b/tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/abstracts/WithOptionalLanguageCode.kt
@@ -9,9 +9,3 @@ interface WithOptionalLanguageCode {
         get() = ietfLanguageCode ?.code
 }
 
-interface WithLanguageCode : WithOptionalLanguageCode {
-    override val ietfLanguageCode: IetfLanguageCode
-
-    override val languageCode: String
-        get() = ietfLanguageCode.code
-}
diff --git a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
index c276e6bc05..c0da943b17 100644
--- a/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
+++ b/tgbotapi.extensions.utils/src/commonMain/kotlin/dev/inmo/tgbotapi/extensions/utils/ClassCasts.kt
@@ -23,7 +23,6 @@ import dev.inmo.tgbotapi.types.InlineQueries.InputMessageContent.*
 import dev.inmo.tgbotapi.types.InlineQueries.query.*
 import dev.inmo.tgbotapi.types.InputMedia.*
 import dev.inmo.tgbotapi.types.MessageEntity.textsources.*
-import dev.inmo.tgbotapi.types.abstracts.WithLanguageCode
 import dev.inmo.tgbotapi.types.abstracts.WithOptionalLanguageCode
 import dev.inmo.tgbotapi.types.actions.*
 import dev.inmo.tgbotapi.types.buttons.*
@@ -3117,12 +3116,3 @@ inline fun Any.asWithOptionalLanguageCode(): WithOptionalLanguageCode? = this as
 
 @PreviewFeature
 inline fun Any.requireWithOptionalLanguageCode(): WithOptionalLanguageCode = this as WithOptionalLanguageCode
-
-@PreviewFeature
-inline fun <T> Any.whenWithLanguageCode(block: (WithLanguageCode) -> T) = asWithLanguageCode() ?.let(block)
-
-@PreviewFeature
-inline fun Any.asWithLanguageCode(): WithLanguageCode? = this as? WithLanguageCode
-
-@PreviewFeature
-inline fun Any.requireWithLanguageCode(): WithLanguageCode = this as WithLanguageCode