diff --git a/autotests/CMakeLists.txt b/autotests/CMakeLists.txt
--- a/autotests/CMakeLists.txt
+++ b/autotests/CMakeLists.txt
@@ -11,6 +11,7 @@
  test_core
  test_suggest
  test_settings
+ test_autodetect
  NAME_PREFIX "sonnet-"
  LINK_LIBRARIES KF5::SonnetCore Qt5::Test
 )
diff --git a/src/core/guesslanguage.cpp b/src/core/guesslanguage.cpp
--- a/src/core/guesslanguage.cpp
+++ b/src/core/guesslanguage.cpp
@@ -710,6 +710,13 @@
         guesses.append(guessFromTrigrams(sample, s_scriptLanguages.values(script)));
     }
 
+    //if guesses are empty, we just append the languages of the scripts
+    if (guesses.isEmpty() && !scripts.isEmpty()) {
+        for (const QChar::Script script : scripts) {
+            guesses.append(s_scriptLanguages.values(script));
+        }
+    }
+
     return guesses;
 }