diff --git a/res/lang.py b/res/lang.py
index 974449f2a..e894cbb87 100644
--- a/res/lang.py
+++ b/res/lang.py
@@ -7,7 +7,7 @@ import csv
 
 def get_lang(lang):
   out = {}
-  for ln in open('./src/lang/%s.rs'%lang):
+  for ln in open('./src/lang/%s.rs'%lang, encoding='utf8'):
     ln = ln.strip()
     if ln.startswith('("'):
       k, v = line_split(ln)
@@ -39,8 +39,8 @@ def expand():
     if lang in ['en','cn']: continue
     print(lang)
     dict = get_lang(lang)
-    fw = open("./src/lang/%s.rs"%lang, "wt")
-    for line in open('./src/lang/cn.rs'):
+    fw = open("./src/lang/%s.rs"%lang, "wt", encoding='utf8')
+    for line in open('./src/lang/cn.rs', encoding='utf8'):
       line_strip = line.strip()
       if line_strip.startswith('("'):
         k, v = line_split(line_strip)
@@ -57,9 +57,9 @@ def expand():
 def to_csv():
   for fn in glob.glob('./src/lang/*.rs'):
     lang = os.path.basename(fn)[:-3]
-    csvfile = open('./src/lang/%s.csv'%lang, "wt")
+    csvfile = open('./src/lang/%s.csv'%lang, "wt", encoding='utf8')
     csvwriter = csv.writer(csvfile)
-    for line in open(fn):
+    for line in open(fn, encoding='utf8'):
       line_strip = line.strip()
       if line_strip.startswith('("'):
         k, v = line_split(line_strip)
@@ -68,8 +68,8 @@ def to_csv():
 
 
 def to_rs(lang):
-  csvfile = open('%s.csv'%lang, "rt")
-  fw = open("./src/lang/%s.rs"%lang, "wt")
+  csvfile = open('%s.csv'%lang, "rt", encoding='utf8')
+  fw = open("./src/lang/%s.rs"%lang, "wt", encoding='utf8')
   fw.write('''lazy_static::lazy_static! {
 pub static ref T: std::collections::HashMap<&'static str, &'static str> =
     [