From c25f40927e416a02d7d93d3cf40fc7183af45510 Mon Sep 17 00:00:00 2001
From: liwenhao2 <liwenhao@hyron.com>
Date: Tue, 15 Sep 2026 10:59:36 +0800
Subject: [PATCH] =?UTF-8?q?=E7=BF=BB=E8=AF=91=E4=B8=89=E8=AF=AD=E9=94=81?=
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---
 .../main/java/com/k2fsa/sherpa/onnx/MainActivity.kt | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt b/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
index 639a1b7..ce6c269 100644
--- a/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
+++ b/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
@@ -2113,7 +2113,8 @@ class MainActivity : AppCompatActivity() {
                 engine.generate(
                     systemPrompt = "你是专业翻译。把给出的句子翻译成" + targetName +
                             "。只输出译文本身,不要解释、不要引号、不要抄写原文。" +
-                            langHint + "。",
+                            "你只在中文、日本語、English 三种语言之间翻译;" +
+                            "输入不属于这三种语言时输出空字符串。" + langHint + "。",
                     userPrompt = segKeys[0].second,
                     maxNewTokens = budget, temperature = temp,
                 )
@@ -2134,6 +2135,7 @@ class MainActivity : AppCompatActivity() {
                             "只输出JSON对象,键是编号字符串,值是译文," +
                             "例如 {\"1\":\"…\",\"2\":\"…\"}。不得增删编号。" +
                             "严禁把原文照抄为译文;无法翻译的段值输出空字符串。" +
+                            "你只在中文、日本語、English 三种语言之间翻译。" +
                             langHint + "。",
                     userPrompt = "【文本】\n" + numbered,
                     maxNewTokens = budget, temperature = temp,
@@ -2160,6 +2162,7 @@ class MainActivity : AppCompatActivity() {
                         e2.generate(
                             systemPrompt = "你是专业翻译。把给出的文本翻译成" +
                                     targetName + "。只输出译文本身,不要解释。" +
+                                    "你只在中文、日本語、English 三种语言之间翻译。" +
                                     langHint + "。",
                             userPrompt = st.second,
                             maxNewTokens = (st.second.length * 2 + 96)
@@ -2242,6 +2245,14 @@ class MainActivity : AppCompatActivity() {
     // ja 必须含足量假名;zh 不得有假名且繁体专用字 ≤1;en 不得含 CJK。
     private val tradOnlyChars = "們這來說對學體豐華讓裡國變顯點單據觀"
     private fun targetLangOk(tr: String): Boolean {
+        // 三语以外文字零容忍(漂移成俄语/韩语/阿语/泰语等时任何目标语都不该放行)
+        tr.forEach { c ->
+            val cp = c.code
+            if (cp in 0x400..0x4FF || cp in 0x600..0x6FF || cp in 0x590..0x5FF ||
+                    cp in 0xE00..0xE7F || cp in 0x3130..0x318F ||
+                    cp in 0xAC00..0xD7AF || cp in 0x1100..0x11FF
+            ) return false
+        }
         if (tr.length < 12) return true
         return when (uiLanguage()) {
             "ja" -> {