diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/genericStructuredFile/in/GenericStructuredProcessor.kt b/backend/data/src/main/kotlin/io/tolgee/formats/genericStructuredFile/in/GenericStructuredProcessor.kt
index 518ae7d6be..7d6164c6ed 100644
--- a/backend/data/src/main/kotlin/io/tolgee/formats/genericStructuredFile/in/GenericStructuredProcessor.kt
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/genericStructuredFile/in/GenericStructuredProcessor.kt
@@ -3,9 +3,9 @@ package io.tolgee.formats.genericStructuredFile.`in`
 import io.tolgee.formats.ImportFileProcessor
 import io.tolgee.formats.MessageConvertorResult
 import io.tolgee.formats.allPluralKeywords
-import io.tolgee.formats.i18next.ParsedI18nextKey
-import io.tolgee.formats.i18next.PluralsI18nextKeyParser
 import io.tolgee.formats.importCommon.ImportFormat
+import io.tolgee.formats.importCommon.ParsedPluralsKey
+import io.tolgee.formats.importCommon.PluralsKeyParser
 import io.tolgee.service.dataImport.processors.FileProcessorContext
 
 class GenericStructuredProcessor(
@@ -15,8 +15,6 @@ class GenericStructuredProcessor(
   private val languageTag: String? = null,
   private val format: ImportFormat,
 ) : ImportFileProcessor() {
-  private val keyParser = PluralsI18nextKeyParser()
-
   override fun process() {
     data.preprocess().import("")
   }
@@ -41,44 +39,49 @@ class GenericStructuredProcessor(
     return this.map { it.preprocess() }
   }
 
-  private fun Map<*, *>.groupByPlurals(keyRegex: Regex): Map<String?, List<Pair<ParsedI18nextKey, Any?>>> {
+  private fun Any?.parsePluralsKey(keyParser: PluralsKeyParser): ParsedPluralsKey? {
+    val key = this as? String ?: return null
+    return keyParser.parse(key).takeIf {
+      it.key != null && it.plural in allPluralKeywords
+    } ?: ParsedPluralsKey(null, null, key)
+  }
+
+  private fun Map<*, *>.groupByPlurals(
+    keyParser: PluralsKeyParser
+  ): Map<String?, List<Pair<ParsedPluralsKey, Any?>>> {
     return this.entries.mapIndexedNotNull { idx, (key, value) ->
-      if (key !is String) {
-        context.fileEntity.addKeyIsNotStringIssue(key.toString(), idx)
-        return@mapIndexedNotNull null
+      key.parsePluralsKey(keyParser)?.let { it to value }.also {
+        if (it == null) {
+          context.fileEntity.addKeyIsNotStringIssue(key.toString(), idx)
+        }
       }
-      val default = ParsedI18nextKey(null, null, key)
-
-      val match = keyRegex.find(key) ?: return@mapIndexedNotNull default to value
-      val parsedKey = keyParser.parse(match)
+    }.groupBy { (parsedKey, _) -> parsedKey.key }.toMap()
+  }
 
-      if (parsedKey?.key == null || parsedKey.plural == null || parsedKey.plural !in allPluralKeywords) {
-        return@mapIndexedNotNull default to value
-      }
+  private fun List<Pair<ParsedPluralsKey, Any?>>.useOriginalKey(): List<Pair<String, Any?>> {
+    return map { (parsedKey, value) ->
+      parsedKey.originalKey to value
+    }
+  }
 
-      return@mapIndexedNotNull parsedKey to value
-    }.groupBy { (parsedKey, _) ->
-      parsedKey.key
-    }.toMap()
+  private fun List<Pair<ParsedPluralsKey, Any?>>.usePluralsKey(commonKey: String): List<Pair<String, Any?>> {
+    return listOf(commonKey to this.associate { (parsedKey, value) ->
+      parsedKey.plural to value
+    })
   }
 
   private fun Map<*, *>.preprocessMap(): Map<*, *> {
-    if (format.pluralsViaSuffixesRegex == null) {
+    if (format.pluralsViaSuffixesParser == null) {
       return this.mapValues { (_, value) -> value.preprocess() }
     }
 
-    val plurals = this.groupByPlurals(format.pluralsViaSuffixesRegex)
+    val plurals = this.groupByPlurals(format.pluralsViaSuffixesParser)
 
-    return plurals.flatMap { (key, values) ->
-      if (key == null || values.size < 2) {
-        // Fallback for non-plural keys
-        values.map { (parsedKey, value) ->
-          parsedKey.fullMatch to value
-        }
+    return plurals.flatMap { (commonKey, values) ->
+      if (commonKey == null || values.size < 2) {
+        values.useOriginalKey()
       } else {
-        listOf(key to values.map { (parsedKey, value) ->
-          parsedKey.plural to value
-        }.toMap())
+        values.usePluralsKey(commonKey)
       }
     }.toMap()
   }
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/getGroupOrNull.kt b/backend/data/src/main/kotlin/io/tolgee/formats/getGroupOrNull.kt
new file mode 100644
index 0000000000..8fddc3ee5a
--- /dev/null
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/getGroupOrNull.kt
@@ -0,0 +1,12 @@
+package io.tolgee.formats
+
+fun MatchGroupCollection.getGroupOrNull(name: String): MatchGroup? {
+  try {
+    return this[name]
+  } catch (e: IllegalArgumentException) {
+    if (e.message?.contains("No group with name") != true) {
+      throw e
+    }
+    return null
+  }
+}
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/ParsedI18nextKey.kt b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/ParsedI18nextKey.kt
deleted file mode 100644
index d8d523eb0c..0000000000
--- a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/ParsedI18nextKey.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package io.tolgee.formats.i18next
-
-data class ParsedI18nextKey(
-  val key: String? = null,
-  val plural: String? = null,
-  val fullMatch: String,
-)
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/PluralsI18nextKeyParser.kt b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/PluralsI18nextKeyParser.kt
deleted file mode 100644
index 90cbc7cc17..0000000000
--- a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/PluralsI18nextKeyParser.kt
+++ /dev/null
@@ -1,23 +0,0 @@
-package io.tolgee.formats.i18next
-
-class PluralsI18nextKeyParser {
-  fun parse(match: MatchResult): ParsedI18nextKey? {
-    return ParsedI18nextKey(
-      key = match.groups.getGroupOrNull("key")?.value,
-      plural = match.groups.getGroupOrNull("plural")?.value,
-      fullMatch = match.value,
-    )
-  }
-
-  //  FIXME: move somewhere shared
-  private fun MatchGroupCollection.getGroupOrNull(name: String): MatchGroup? {
-    try {
-      return this[name]
-    } catch (e: IllegalArgumentException) {
-      if (e.message?.contains("No group with name") != true) {
-        throw e
-      }
-      return null
-    }
-  }
-}
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/I18nextParameterParser.kt b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/I18nextParameterParser.kt
similarity index 50%
rename from backend/data/src/main/kotlin/io/tolgee/formats/i18next/I18nextParameterParser.kt
rename to backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/I18nextParameterParser.kt
index d86b479fea..085fb49fe5 100644
--- a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/I18nextParameterParser.kt
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/I18nextParameterParser.kt
@@ -1,4 +1,6 @@
-package io.tolgee.formats.i18next
+package io.tolgee.formats.i18next.`in`
+
+import io.tolgee.formats.getGroupOrNull
 
 class I18nextParameterParser {
   fun parse(match: MatchResult): ParsedI18nextParam? {
@@ -9,16 +11,4 @@ class I18nextParameterParser {
       fullMatch = match.value,
     )
   }
-
-//  FIXME: move somewhere shared
-  private fun MatchGroupCollection.getGroupOrNull(name: String): MatchGroup? {
-    try {
-      return this[name]
-    } catch (e: IllegalArgumentException) {
-      if (e.message?.contains("No group with name") != true) {
-        throw e
-      }
-      return null
-    }
-  }
 }
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/ParsedI18nextParam.kt b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/ParsedI18nextParam.kt
similarity index 79%
rename from backend/data/src/main/kotlin/io/tolgee/formats/i18next/ParsedI18nextParam.kt
rename to backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/ParsedI18nextParam.kt
index 38f3864b60..dfe969ad76 100644
--- a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/ParsedI18nextParam.kt
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/ParsedI18nextParam.kt
@@ -1,4 +1,4 @@
-package io.tolgee.formats.i18next
+package io.tolgee.formats.i18next.`in`
 
 data class ParsedI18nextParam(
   val key: String? = null,
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/PluralsI18nextKeyParser.kt b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/PluralsI18nextKeyParser.kt
new file mode 100644
index 0000000000..87163e558f
--- /dev/null
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/i18next/in/PluralsI18nextKeyParser.kt
@@ -0,0 +1,16 @@
+package io.tolgee.formats.i18next.`in`
+
+import io.tolgee.formats.getGroupOrNull
+import io.tolgee.formats.importCommon.ParsedPluralsKey
+import io.tolgee.formats.importCommon.PluralsKeyParser
+
+class PluralsI18nextKeyParser(private val keyRegex: Regex) : PluralsKeyParser {
+  override fun parse(key: String): ParsedPluralsKey {
+    val match = keyRegex.find(key)
+    return ParsedPluralsKey(
+      key = match?.groups?.getGroupOrNull("key")?.value,
+      plural = match?.groups?.getGroupOrNull("plural")?.value,
+      originalKey = key,
+    )
+  }
+}
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/ImportFormat.kt b/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/ImportFormat.kt
index 98b61e2fd9..c59c828578 100644
--- a/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/ImportFormat.kt
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/ImportFormat.kt
@@ -11,14 +11,14 @@ import io.tolgee.formats.po.`in`.PoToIcuMessageConvertor
 enum class ImportFormat(
   val fileFormat: ImportFileFormat,
   val pluralsViaNesting: Boolean = false,
-  val pluralsViaSuffixesRegex: Regex? = null,
+  val pluralsViaSuffixesParser: PluralsKeyParser? = null,
   val messageConvertorOrNull: ImportMessageConvertor? = null,
   val rootKeyIsLanguageTag: Boolean = false,
 ) {
   JSON_I18NEXT(
     ImportFileFormat.JSON,
     messageConvertorOrNull = GenericMapPluralImportRawDataConvertor { I18nextToIcuPlaceholderConvertor() },
-    pluralsViaSuffixesRegex = I18nextToIcuPlaceholderConvertor.I18NEXT_PLURAL_SUFFIX_REGEX,
+    pluralsViaSuffixesParser = I18nextToIcuPlaceholderConvertor.I18NEXT_PLURAL_SUFFIX_KEY_PARSER,
   ),
   JSON_ICU(
     ImportFileFormat.JSON,
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/ParsedPluralsKey.kt b/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/ParsedPluralsKey.kt
new file mode 100644
index 0000000000..13af6cdf9a
--- /dev/null
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/ParsedPluralsKey.kt
@@ -0,0 +1,7 @@
+package io.tolgee.formats.importCommon
+
+data class ParsedPluralsKey(
+  val key: String? = null,
+  val plural: String? = null,
+  val originalKey: String,
+)
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/PluralsKeyParser.kt b/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/PluralsKeyParser.kt
new file mode 100644
index 0000000000..4f08f13a53
--- /dev/null
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/importCommon/PluralsKeyParser.kt
@@ -0,0 +1,5 @@
+package io.tolgee.formats.importCommon
+
+interface PluralsKeyParser {
+  fun parse(key: String): ParsedPluralsKey
+}
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/paramConvertors/in/I18nextToIcuPlaceholderConvertor.kt b/backend/data/src/main/kotlin/io/tolgee/formats/paramConvertors/in/I18nextToIcuPlaceholderConvertor.kt
index 4493400811..5853275e5d 100644
--- a/backend/data/src/main/kotlin/io/tolgee/formats/paramConvertors/in/I18nextToIcuPlaceholderConvertor.kt
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/paramConvertors/in/I18nextToIcuPlaceholderConvertor.kt
@@ -2,7 +2,8 @@ package io.tolgee.formats.paramConvertors.`in`
 
 import io.tolgee.formats.ToIcuPlaceholderConvertor
 import io.tolgee.formats.escapeIcu
-import io.tolgee.formats.i18next.I18nextParameterParser
+import io.tolgee.formats.i18next.`in`.I18nextParameterParser
+import io.tolgee.formats.i18next.`in`.PluralsI18nextKeyParser
 
 class I18nextToIcuPlaceholderConvertor : ToIcuPlaceholderConvertor {
   private val parser = I18nextParameterParser()
@@ -64,5 +65,7 @@ class I18nextToIcuPlaceholderConvertor : ToIcuPlaceholderConvertor {
 
     val I18NEXT_PLURAL_SUFFIX_REGEX = """^(?<key>\w+)_(?<plural>\w+)$""".toRegex()
 
+    val I18NEXT_PLURAL_SUFFIX_KEY_PARSER = PluralsI18nextKeyParser(I18NEXT_PLURAL_SUFFIX_REGEX)
+
   }
 }
diff --git a/backend/data/src/main/kotlin/io/tolgee/formats/po/in/CLikeParameterParser.kt b/backend/data/src/main/kotlin/io/tolgee/formats/po/in/CLikeParameterParser.kt
index d7449d0852..b6673cce14 100644
--- a/backend/data/src/main/kotlin/io/tolgee/formats/po/in/CLikeParameterParser.kt
+++ b/backend/data/src/main/kotlin/io/tolgee/formats/po/in/CLikeParameterParser.kt
@@ -1,5 +1,7 @@
 package io.tolgee.formats.po.`in`
 
+import io.tolgee.formats.getGroupOrNull
+
 class CLikeParameterParser {
   fun parse(match: MatchResult): ParsedCLikeParam? {
     val specifierGroup = match.groups["specifier"]
@@ -18,15 +20,4 @@ class CLikeParameterParser {
       fullMatch = match.value,
     )
   }
-
-  private fun MatchGroupCollection.getGroupOrNull(name: String): MatchGroup? {
-    try {
-      return this[name]
-    } catch (e: IllegalArgumentException) {
-      if (e.message?.contains("No group with name") != true) {
-        throw e
-      }
-      return null
-    }
-  }
 }