diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index 888e680219f1..687ca4d4d423 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -1265,7 +1265,7 @@ void TextEdit::_notification(int p_what) {
 					}
 
 					if (!clipped && lookup_symbol_word.length() != 0) { // Highlight word
-						if (is_ascii_alphabet_char(lookup_symbol_word[0]) || lookup_symbol_word[0] == '_' || lookup_symbol_word[0] == '.') {
+						if (is_unicode_identifier_start(lookup_symbol_word[0]) || lookup_symbol_word[0] == '.') {
 							Color highlight_underline_color = !editable ? theme_cache.font_readonly_color : theme_cache.font_color;
 							int lookup_symbol_word_col = _get_column_pos_of_word(lookup_symbol_word, str, SEARCH_MATCH_CASE | SEARCH_WHOLE_WORDS, 0);
 							int lookup_symbol_word_len = lookup_symbol_word.length();