diff --git a/tools/diff.sh b/tools/diff.sh
new file mode 100644
index 0000000..92b0515
--- /dev/null
+++ b/tools/diff.sh
@@ -0,0 +1,88 @@
+process_files() {
+    for file in "$1"/*; do
+        if [ -d "$file" ]; then
+            # 如果是目录，则递归调用函数
+            process_files "$file"
+        elif [ -f "$file" ]; then
+            # 如果是文件，检查是否为文本文件
+            if [[ $file == *.txt ]]; then
+                echo "$file is a text file."
+                # '{' 和 '}'
+                # original_tag = xxx
+                sed -i 's/original_tag = ENG/original_tag = HUJ/g' "$file"
+                sed -i 's/original_tag = USA/original_tag = BYG/g' "$file"
+                sed -i 's/original_tag = CHI/original_tag = DOH/g' "$file"
+                sed -i 's/original_tag = PRC/original_tag = DOH/g' "$file"
+                sed -i 's/original_tag = SOV/original_tag = BFL/g' "$file"
+                sed -i 's/original_tag = GER/original_tag = TIX/g' "$file"
+                sed -i 's/original_tag = FRA/original_tag = YUW/g' "$file"
+                sed -i 's/original_tag = JAP/original_tag = CHY/g' "$file"
+                sed -i 's/original_tag = ITA/original_tag = SAD/g' "$file"
+                # has_war_with = xxx
+                sed -i 's/has_war_with = ENG/has_war_with = HUJ/g' "$file"
+                sed -i 's/has_war_with = USA/has_war_with = BYG/g' "$file"
+                sed -i 's/has_war_with = CHI/has_war_with = DOH/g' "$file"
+                sed -i 's/has_war_with = PRC/has_war_with = DOH/g' "$file"
+                sed -i 's/has_war_with = SOV/has_war_with = BFL/g' "$file"
+                sed -i 's/has_war_with = GER/has_war_with = TIX/g' "$file"
+                sed -i 's/has_war_with = FRA/has_war_with = YUW/g' "$file"
+                sed -i 's/has_war_with = JAP/has_war_with = CHY/g' "$file"
+                sed -i 's/has_war_with = ITA/has_war_with = SAD/g' "$file"
+                # tag = xxx
+                sed -i 's/tag = ENG/tag = HUJ/g' "$file"
+                sed -i 's/tag = USA/tag = BYG/g' "$file"
+                sed -i 's/tag = CHI/tag = DOH/g' "$file"
+                sed -i 's/tag = PRC/tag = DOH/g' "$file"
+                sed -i 's/tag = SOV/tag = BFL/g' "$file"
+                sed -i 's/tag = GER/tag = TIX/g' "$file"
+                sed -i 's/tag = FRA/tag = YUW/g' "$file"
+                sed -i 's/tag = JAP/tag = CHY/g' "$file"
+                sed -i 's/tag = ITA/tag = SAD/g' "$file"
+                # TAG = xxx
+                sed -i 's/TAG = ENG/tag = HUJ/g' "$file"
+                sed -i 's/TAG = USA/tag = BYG/g' "$file"
+                sed -i 's/TAG = CHI/tag = DOH/g' "$file"
+                sed -i 's/TAG = PRC/tag = DOH/g' "$file"
+                sed -i 's/TAG = SOV/tag = BFL/g' "$file"
+                sed -i 's/TAG = GER/tag = TIX/g' "$file"
+                sed -i 's/TAG = FRA/tag = YUW/g' "$file"
+                sed -i 's/TAG = JAP/tag = CHY/g' "$file"
+                sed -i 's/TAG = ITA/tag = SAD/g' "$file"
+                # other = xxx
+                sed -i 's/other = ENG/other = HUJ/g' "$file"
+                sed -i 's/other = USA/other = BYG/g' "$file"
+                sed -i 's/other = CHI/other = DOH/g' "$file"
+                sed -i 's/other = PRC/other = DOH/g' "$file"
+                sed -i 's/other = SOV/other = BFL/g' "$file"
+                sed -i 's/other = GER/other = TIX/g' "$file"
+                sed -i 's/other = FRA/other = YUW/g' "$file"
+                sed -i 's/other = JAP/other = CHY/g' "$file"
+                sed -i 's/other = ITA/other = SAD/g' "$file"
+                # is_ally_with = xxx
+                sed -i 's/is_ally_with = ENG/is_ally_with = HUJ/g' "$file"
+                sed -i 's/is_ally_with = USA/is_ally_with = BYG/g' "$file"
+                sed -i 's/is_ally_with = CHI/is_ally_with = DOH/g' "$file"
+                sed -i 's/is_ally_with = PRC/is_ally_with = DOH/g' "$file"
+                sed -i 's/is_ally_with = SOV/is_ally_with = BFL/g' "$file"
+                sed -i 's/is_ally_with = GER/is_ally_with = TIX/g' "$file"
+                sed -i 's/is_ally_with = FRA/is_ally_with = YUW/g' "$file"
+                sed -i 's/is_ally_with = JAP/is_ally_with = CHY/g' "$file"
+                sed -i 's/is_ally_with = ITA/is_ally_with = SAD/g' "$file"
+                # Others 1
+                sed -i -E 's/(^|[[:space:]]|\{|})ENG($|[[:space:]]|\{|})/\1HUJ\2/g' "$file"
+                sed -i -E 's/(^|[[:space:]]|\{|})USA($|[[:space:]]|\{|})/\1BYG\2/g' "$file"
+                # sed -i -E 's/(^|[[:space:]]|\{|})CHI($|[[:space:]]|\{|})/\1DOH\2/g' "$file"
+                sed -i -E 's/(^|[[:space:]]|\{|})PRC($|[[:space:]]|\{|})/\1DOH\2/g' "$file"
+                sed -i -E 's/(^|[[:space:]]|\{|})SOV($|[[:space:]]|\{|})/\1HUJ\2/g' "$file"
+                sed -i -E 's/(^|[[:space:]]|\{|})GER($|[[:space:]]|\{|})/\1HUJ\2/g' "$file"
+                sed -i -E 's/(^|[[:space:]]|\{|})FRA($|[[:space:]]|\{|})/\1HUJ\2/g' "$file"
+                sed -i -E 's/(^|[[:space:]]|\{|})JAP($|[[:space:]]|\{|})/\1HUJ\2/g' "$file"
+                sed -i -E 's/(^|[[:space:]]|\{|})ITA($|[[:space:]]|\{|})/\1HUJ\2/g' "$file"
+            fi
+        fi
+    done
+}
+
+# 调用函数，从指定目录开始
+process_files src
+