diff --git a/backend/app/src/test/kotlin/io/tolgee/api/v2/controllers/organizationController/OrganizationProjectsControllerTest.kt b/backend/app/src/test/kotlin/io/tolgee/api/v2/controllers/organizationController/OrganizationProjectsControllerTest.kt
index e5476ac6b1..ae50607e37 100644
--- a/backend/app/src/test/kotlin/io/tolgee/api/v2/controllers/organizationController/OrganizationProjectsControllerTest.kt
+++ b/backend/app/src/test/kotlin/io/tolgee/api/v2/controllers/organizationController/OrganizationProjectsControllerTest.kt
@@ -1,6 +1,7 @@
 package io.tolgee.api.v2.controllers.organizationController
 
 import io.tolgee.development.testDataBuilder.data.PermissionsTestData
+import io.tolgee.development.testDataBuilder.data.ProjectTranslationsStatsTestData
 import io.tolgee.fixtures.andAssertThatJson
 import io.tolgee.fixtures.andIsOk
 import io.tolgee.fixtures.andPrettyPrint
@@ -126,4 +127,23 @@ class OrganizationProjectsControllerTest : AuthorizedControllerTest() {
         node("_embedded.projects").isArray.hasSize(1)
       }
   }
+
+  @Test
+  fun `project with single language should show correct translation percentages`() {
+    val testData = ProjectTranslationsStatsTestData()
+    val user = testData.admin.self
+
+    testDataService.saveTestData(testData.root)
+    userAccount = user
+    performAuthGet("/v2/organizations/${testData.organizationBuilder.self.id}/projects-with-stats").andPrettyPrint
+      .andAssertThatJson {
+        node("_embedded.projects") {
+          node("").isArray.hasSize(1)
+          node("[0].stats.translationStatePercentages") {
+            node("TRANSLATED").isNumber.isEqualTo("100.0")
+            node("UNTRANSLATED").isNumber.isEqualTo("0.0")
+          }
+        }
+      }
+  }
 }
diff --git a/backend/data/src/main/kotlin/io/tolgee/development/testDataBuilder/data/ProjectTranslationsStatsTestData.kt b/backend/data/src/main/kotlin/io/tolgee/development/testDataBuilder/data/ProjectTranslationsStatsTestData.kt
new file mode 100644
index 0000000000..55f308c0e1
--- /dev/null
+++ b/backend/data/src/main/kotlin/io/tolgee/development/testDataBuilder/data/ProjectTranslationsStatsTestData.kt
@@ -0,0 +1,28 @@
+package io.tolgee.development.testDataBuilder.data
+
+import io.tolgee.development.testDataBuilder.builders.OrganizationBuilder
+import io.tolgee.development.testDataBuilder.builders.TestDataBuilder
+import io.tolgee.development.testDataBuilder.builders.UserAccountBuilder
+
+class ProjectTranslationsStatsTestData {
+  var organizationBuilder: OrganizationBuilder
+  var admin: UserAccountBuilder
+
+  val root: TestDataBuilder =
+    TestDataBuilder().apply {
+      admin = addUserAccount { username = "admin@admin.com" }
+
+      organizationBuilder = admin.defaultOrganizationBuilder
+
+      addProject { name = "Project" }.build {
+        val en = addEnglish()
+
+        addKey { name = "test_key" }.build {
+          addTranslation {
+            text = "${en.self.name} text"
+            language = en.self
+          }
+        }
+      }
+    }
+}
diff --git a/backend/data/src/main/kotlin/io/tolgee/service/project/ProjectStatsService.kt b/backend/data/src/main/kotlin/io/tolgee/service/project/ProjectStatsService.kt
index 22539399fb..c57cf17e55 100644
--- a/backend/data/src/main/kotlin/io/tolgee/service/project/ProjectStatsService.kt
+++ b/backend/data/src/main/kotlin/io/tolgee/service/project/ProjectStatsService.kt
@@ -61,6 +61,14 @@ class ProjectStatsService(
     val baseWordsCount = baseStats.translatedWords + baseStats.reviewedWords
     val nonBaseLanguages = languageStats.filterNot { it.languageId == baseLanguage.id }
 
+    if (nonBaseLanguages.isEmpty()) {
+      return ProjectStateTotals(
+        baseWordsCount = baseWordsCount,
+        translatedPercent = baseStats.translatedPercentage,
+        reviewedPercent = baseStats.reviewedPercentage,
+      )
+    }
+
     val allNonBaseTotalBaseWords = baseWordsCount * nonBaseLanguages.size
     val allNonBaseTotalTranslatedWords = nonBaseLanguages.sumOf { it.translatedWords }
     val allNonBaseTotalReviewedWords = nonBaseLanguages.sumOf { it.reviewedWords }