diff --git a/CMakeLists.txt b/CMakeLists.txt
index 98728dd39..191eaeded 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1094,8 +1094,10 @@ add_custom_target (etags COMMAND ${ETAGS} -o ${CMAKE_SOURCE_DIR}/TAGS -R ${sourc
 
 # Qt i18n
 set (LANGUAGES
-  en_GB
-  pt_PT
+  en_GB				# English UK
+  pt_PT				# Poutuguese
+  es_ES				# Spanish
+  ca_ES				# Catalan
   )
 foreach (lang_ ${LANGUAGES})
   file (TO_NATIVE_PATH translations/wsjtx_${lang_}.ts ts_)