diff --git a/orangecontrib/text/widgets/owpreprocess.py b/orangecontrib/text/widgets/owpreprocess.py
index ede04d90c..36b97b13d 100644
--- a/orangecontrib/text/widgets/owpreprocess.py
+++ b/orangecontrib/text/widgets/owpreprocess.py
@@ -40,6 +40,7 @@
 from Orange.widgets.widget import Input, Output, Msg, Message
 
 from orangecontrib.text import Corpus
+from orangecontrib.text.language import ISO2LANG, LANG2ISO
 from orangecontrib.text.misc import nltk_data_dir
 from orangecontrib.text.preprocess import *
 from orangecontrib.text.preprocess.normalize import UDPipeStopIteration
@@ -78,6 +79,8 @@ def __init__(self, master: BaseEditor, items: List[str], value: str,
         self.setCurrentText(value)
         self.currentTextChanged.connect(callback)
 
+    # todo: idea uporabi se userRole za shranit iso code in potem callback vrne iso code
+
 
 class UDPipeComboBox(QComboBox):
     def __init__(self, master: BaseEditor, value: str, default: str,
@@ -439,7 +442,7 @@ class NormalizationModule(SingleMethodModule):
                UDPipe: UDPipeLemmatizer,
                Lemmagen: LemmagenLemmatizer}
     DEFAULT_METHOD = Porter
-    DEFAULT_LANGUAGE = "English"
+    DEFAULT_LANGUAGE = "en"
     DEFAULT_USE_TOKE = False
 
     def __init__(self, parent=None, **kwargs):
@@ -450,7 +453,7 @@ def __init__(self, parent=None, **kwargs):
         self.__use_tokenizer = self.DEFAULT_USE_TOKE
 
         self.__combo_sbl = ComboBox(
-            self, SnowballStemmer.supported_languages,
+            self, [ISO2LANG[lang] for lang in SnowballStemmer.supported_languages],
             self.__snowball_lang, self.__set_snowball_lang
         )
         self.__combo_udl = UDPipeComboBox(
@@ -461,7 +464,7 @@ def __init__(self, parent=None, **kwargs):
                                      checked=self.DEFAULT_USE_TOKE)
         self.__check_use.clicked.connect(self.__set_use_tokenizer)
         self.__combo_lemm = ComboBox(
-            self, LemmagenLemmatizer.supported_languages,
+            self, [ISO2LANG[lang] for lang in LemmagenLemmatizer.supported_languages],
             self.__lemmagen_lang, self.__set_lemmagen_lang
         )
 
@@ -508,24 +511,27 @@ def _set_method(self, method: int):
         self.__enable_udpipe()
 
     def __set_snowball_lang(self, language: str):
-        if self.__snowball_lang != language:
-            self.__snowball_lang = language
+        iso_language = LANG2ISO[language]
+        if self.__snowball_lang != iso_language:
+            self.__snowball_lang = iso_language
             self.__combo_sbl.setCurrentText(language)
             self.changed.emit()
             if self.method == self.Snowball:
                 self.edited.emit()
 
     def __set_udpipe_lang(self, language: str):
-        if self.__udpipe_lang != language:
-            self.__udpipe_lang = language
+        iso_language = LANG2ISO[language]
+        if self.__udpipe_lang != iso_language:
+            self.__udpipe_lang = iso_language
             self.__combo_udl.setCurrentText(language)
             self.changed.emit()
             if self.method == self.UDPipe:
                 self.edited.emit()
 
     def __set_lemmagen_lang(self, language: str):
-        if self.__lemmagen_lang != language:
-            self.__lemmagen_lang = language
+        iso_language = LANG2ISO[language]
+        if self.__lemmagen_lang != iso_language:
+            self.__lemmagen_lang = iso_language
             self.__combo_lemm.setCurrentText(language)
             self.changed.emit()
             if self.method == self.Lemmagen:
@@ -586,7 +592,7 @@ class FilteringModule(MultipleMethodModule):
                MostFreq: MostFrequentTokensFilter,
                PosTag: PosTagFilter}
     DEFAULT_METHODS = [Stopwords]
-    DEFAULT_LANG = "English"
+    DEFAULT_LANG = "en"
     DEFAULT_NONE = None
     DEFAULT_INCL_NUM = False
     DEFAULT_PATTERN = r"\.|,|:|;|!|\?|\(|\)|\||\+|\'|\"|‘|’|“|”|\'|" \
@@ -772,8 +778,9 @@ def setParameters(self, params: Dict):
         self.__invalidated = False
 
     def __set_language(self, language: str):
-        if self.__sw_lang != language:
-            self.__sw_lang = language
+        iso_language = LANG2ISO[language]
+        if self.__sw_lang != iso_language:
+            self.__sw_lang = iso_language
             self.__combo.setCurrentText(language)
             self.changed.emit()
             if self.Stopwords in self.methods:
@@ -1042,7 +1049,7 @@ class OWPreprocess(Orange.widgets.data.owpreprocess.OWPreprocess,
     priority = 200
     keywords = []
 
-    settings_version = 3
+    settings_version = 4
 
     class Inputs:
         corpus = Input("Corpus", Corpus)
@@ -1081,6 +1088,7 @@ class Warning(Orange.widgets.data.owpreprocess.OWPreprocess.Warning):
     PREPROCESSORS = PREPROCESS_ACTIONS
     DEFAULT_PP = {"preprocessors": [("preprocess.transform", {}),
                                     ("preprocess.tokenize", {}),
+                                    ("preprocess.normalize", {}),
                                     ("preprocess.filter", {})]
                   }  # type: Dict[str, List[Tuple[str, Dict]]]
     storedsettings = Setting(DEFAULT_PP)
@@ -1133,6 +1141,9 @@ def __relocate_file(self, path: RecentPath) -> RecentPath:
 
     @Inputs.corpus
     def set_data(self, data: Corpus):
+        # todo: language set from corpus
+        #  since they cannot be schema only reset them evrytime according to language
+        #  corpus except on first run
         self.cancel()
         self.data = data
 
@@ -1338,6 +1349,19 @@ def str_into_paths(label):
                     del pp_settings["start"]
                     del pp_settings["end"]
 
+        # before version 4 languages were saved as full-word language strings
+        if version < 4:
+            preprocessors = settings["storedsettings"]["preprocessors"]
+            if "preprocess.normalize" in preprocessors:
+                pp_settings = preprocessors["preprocess.normalize"]
+                for k in ("snowball_language", "udpipe_language", "lemmagen_language"):
+                    pp_settings[k] = LANG2ISO[pp_settings[k]]
+                    pp_settings[k] = LANG2ISO[pp_settings[k]]
+                    pp_settings[k] = LANG2ISO[pp_settings[k]]
+            if "preprocess.filter" in preprocessors:
+                pp_settings = preprocessors["preprocess.filter"]
+                pp_settings["language"] = LANG2ISO[pp_settings["language"]]
+
 
 if __name__ == "__main__":
     from Orange.widgets.utils.widgetpreview import WidgetPreview