diff --git a/autosyl/LyricsAlignment/wrapper.py b/autosyl/LyricsAlignment/wrapper.py
index 825ec7c7794955ba01769c713137e7cb28206c02..9e43b4bbe9c59074141669cb7aa11f9e357f91a6 100644
--- a/autosyl/LyricsAlignment/wrapper.py
+++ b/autosyl/LyricsAlignment/wrapper.py
@@ -166,7 +166,7 @@ def preprocess_lyrics(lyrics_lines, word_file=None, language="jp"):
     else:
         words_lines = full_lyrics.split()
 
-    lyrics_p, words_p, idx_word_p, idx_line_p = utils.gen_phone_gt(words_lines, raw_lines, language=language)
+    lyrics_p, words_p, idx_word_p, idx_line_p = utils.gen_phone_gt(words_lines, raw_lines, language=(language if language else "jp"))
 
     return words_lines, lyrics_p, idx_word_p, idx_line_p