diff --git a/GoogleTranslator.py b/GoogleTranslator.py
index 4586271..f9d6b23 100644
--- a/GoogleTranslator.py
+++ b/GoogleTranslator.py
@@ -5,9 +5,11 @@ from urllib.parse import quote
 class GoogleTranslator():
     def __init__(self, fr, to):
         # set up
+        self.languageCode = {}
         self.fr = fr
         self.to = to
-        print("from {} to {}".format(fr, to))
+
+        self.loadLanguageCode()
 
         self.URL = "https://translate.google.com.tw/_/TranslateWebserverUi/data/batchexecute?\
             rpcids=MkEWBc&\
@@ -28,6 +30,15 @@ class GoogleTranslator():
         # can't sure whether it works for everyone, token in this URL might been blocked.
         self.DATA = "f.req=%5B%5B%5B%22MkEWBc%22%2C%22%5B%5B%5C%22{}%5C%22%2C%5C%22{}%5C%22%2C%5C%22{}%5C%22%2Ctrue%5D%2C%5Bnull%5D%5D%22%2Cnull%2C%22generic%22%5D%5D%5D&at=AD08yZn6jdbpV8qLjfergSwRT4IO%3A1618543754261&"
 
+    def loadLanguageCode(self):
+        with open('LanguageCode.csv') as fp:
+            data = fp.readlines()
+            data = [line.replace('\n', '') for line in data]
+        
+        for line in data:
+            country, code = line.split(',')
+            self.languageCode[country] = code
+
     def translate(self, text):
         '''
             return a string which translate from self.fr to self.to
diff --git a/LanguageCode.csv b/LanguageCode.csv
new file mode 100644
index 0000000..775c33d
--- /dev/null
+++ b/LanguageCode.csv
@@ -0,0 +1,109 @@
+Afrikaans,af
+Albanian,sq
+Amharic,am
+Arabic,ar
+Armenian,hy
+Azerbaijani,az
+Basque,eu
+Belarusian,be
+Bengali,bn
+Bosnian,bs
+Bulgarian,bg
+Catalan,ca
+Cebuano,ceb
+Chinese (Simplified),zh-CN
+Chinese (Traditional),zh-TW
+Corsican,co
+Croatian,hr
+Czech,cs
+Danish,da
+Dutch,nl
+English,en
+Esperanto,eo
+Estonian,et
+Finnish,fi
+French,fr
+Frisian,fy
+Galician,gl
+Georgian,ka
+German,de
+Greek,el
+Gujarati,gu
+Haitian Creole,ht
+Hausa,ha
+Hawaiian,haw
+Hebrew,he
+Hindi,hi
+Hmong,hmn
+Hungarian,hu
+Icelandic,is
+Igbo,ig
+Indonesian,id
+Irish,ga
+Italian,it
+Japanese,ja
+Javanese,jv
+Kannada,kn
+Kazakh,kk
+Khmer,km
+Kinyarwanda,rw
+Korean,ko
+Kurdish,ku
+Kyrgyz,ky
+Lao,lo
+Latin,la
+Latvian,lv
+Lithuanian,lt
+Luxembourgish,lb
+Macedonian,mk
+Malagasy,mg
+Malay,ms
+Malayalam,ml
+Maltese,mt
+Maori,mi
+Marathi,mr
+Mongolian,mn
+Myanmar(Burmese),my
+Nepali,ne
+Norwegian,no
+Nyanja(Chichewa),ny
+Odia(Oriya),or
+Pashto,ps
+Persian,fa
+Polish,pl
+Portuguese(Portugal or Brazil),pt
+Punjabi,pa
+Romanian,ro
+Russian,ru
+Samoan,sm
+Scots Gaelic,gd
+Serbian,sr
+Sesotho,st
+Shona,sn
+Sindhi,sd
+Sinhala(Sinhalese),si
+Slovak,sk
+Slovenian,sl
+Somali,so
+Spanish,es
+Sundanese,su
+Swahili,sw
+Swedish,sv
+Tagalog(Filipino),tl
+Tajik,tg
+Tamil,ta
+Tatar,tt
+Telugu,te
+Thai,th
+Turkish,tr
+Turkmen,tk
+Ukrainian,uk
+Urdu,ur
+Uyghur,ug
+Uzbek,uz
+Vietnamese,vi
+Welsh,cy
+Xhosa,xh
+Yiddish,yi
+Yoruba,yo
+Zulu,zu
\ No newline at end of file
diff --git a/TUI/Box.py b/TUI/Box.py
new file mode 100644
index 0000000..86867e4
--- /dev/null
+++ b/TUI/Box.py
@@ -0,0 +1,4 @@
+import npyscreen
+
+class EditBox(npyscreen.BoxTitle):
+    _contained_widget = npyscreen.MultiLineEdit
\ No newline at end of file
diff --git a/tui.py b/TUI/MainForm.py
similarity index 86%
rename from tui.py
rename to TUI/MainForm.py
index 8559ad4..c275f47 100644
--- a/tui.py
+++ b/TUI/MainForm.py
@@ -1,15 +1,8 @@
 import npyscreen
 import curses
+from TUI.Box import EditBox
 from GoogleTranslator import GoogleTranslator
 
-class TranslatorApp(npyscreen.NPSAppManaged):
-    def onStart(self):
-        npyscreen.setTheme(npyscreen.Themes.ColorfulTheme)
-        self.addForm("MAIN", MainForm, name="Google Translator - TUI")
-
-class Box(npyscreen.BoxTitle):
-    _contained_widget = npyscreen.MultiLineEdit
-
 class MainForm(npyscreen.FormBaseNew):
     def create(self):
         # set translator
@@ -31,19 +24,20 @@ class MainForm(npyscreen.FormBaseNew):
         # get terminal's size
         y, x = self.useable_space()
 
-        self.input = self.add(Box, name="Input (from)", footer=self.translator.fr, 
+        self.input = self.add(EditBox, name="Input (from)", footer=self.translator.fr, 
             max_width=x//2-5, max_height=y//3,
             relx=3, rely=3,
             value="Hello world"
         )
         
-        self.output = self.add(Box, name="Output (to)", footer=self.translator.to,
+        self.output = self.add(EditBox, name="Output (to)", footer=self.translator.to,
             max_width=x//2-5, max_height=y//3,
             relx=x//2+2, rely=3,
-            value="你好，世界", editable=False
+            value="你好，世界",
+            editable=False
         )
 
-        self.readme = self.add(Box, name="README",
+        self.readme = self.add(EditBox, name="README",
             max_width=x-5, max_height=y//3*2-6,
             relx=3, rely=y//3+4,
             value='''
diff --git a/TUI/TranslatorApp.py b/TUI/TranslatorApp.py
new file mode 100644
index 0000000..3f76bfa
--- /dev/null
+++ b/TUI/TranslatorApp.py
@@ -0,0 +1,7 @@
+import npyscreen
+from TUI.MainForm import MainForm
+
+class TranslatorApp(npyscreen.NPSAppManaged):
+    def onStart(self):
+        npyscreen.setTheme(npyscreen.Themes.ColorfulTheme)
+        self.addForm("MAIN", MainForm, name="Google Translator - TUI")
diff --git a/main.py b/main.py
index 2679d8c..711d78d 100644
--- a/main.py
+++ b/main.py
@@ -1,4 +1,4 @@
-from tui import TranslatorApp
+from TUI.TranslatorApp import TranslatorApp
 
 app = TranslatorApp()
 app.run()
\ No newline at end of file