diff --git a/libretranslate/app.py b/libretranslate/app.py
index 397951c..0952290 100644
--- a/libretranslate/app.py
+++ b/libretranslate/app.py
@@ -37,6 +37,19 @@ from libretranslate.locales import (
 from .api_keys import Database, RemoteDatabase
 from .suggestions import Database as SuggestionsDatabase
 
+# Rough map of emoji characters
+emojis = {e: True for e in \
+  [ord(' ')] +                    # Spaces
+  list(range(0x1F600,0x1F64F)) +  # Emoticons
+  list(range(0x1F300,0x1F5FF)) +  # Misc Symbols and Pictographs
+  list(range(0x1F680,0x1F6FF)) +  # Transport and Map
+  list(range(0x2600,0x26FF)) +    # Misc symbols
+  list(range(0x2700,0x27BF)) +    # Dingbats
+  list(range(0xFE00,0xFE0F)) +    # Variation Selectors
+  list(range(0x1F900,0x1F9FF)) +  # Supplemental Symbols and Pictographs
+  list(range(0x1F1E6,0x1F1FF)) +  # Flags
+  list(range(0x20D0,0x20FF))      # Combining Diacritical Marks for Symbols
+}
 
 def get_version():
     try:
@@ -153,6 +166,19 @@ def filter_unique(seq, extra):
     seen_add = seen.add
     return [x for x in seq if not (x in seen or seen_add(x))]
 
+
+def detect_translatable(src_texts):
+  if isinstance(src_texts, list):
+    return any(detect_translatable(t) for t in src_texts)
+  
+  for ch in src_texts:
+    if not (ord(ch) in emojis):
+      return True
+  
+  # All emojis
+  return False
+
+
 def create_app(args):
     from libretranslate.init import boot
 
@@ -647,13 +673,17 @@ def create_app(args):
 
         if batch:
             request.req_cost = max(1, len(q))
-
-        if source_lang == "auto":
-            candidate_langs = detect_languages(src_texts)
-            detected_src_lang = candidate_langs[0]
+          
+        translatable = detect_translatable(src_texts)
+        if translatable:
+          if source_lang == "auto":
+              candidate_langs = detect_languages(src_texts)
+              detected_src_lang = candidate_langs[0]
+          else:
+              detected_src_lang = {"confidence": 100.0, "language": source_lang}
         else:
-            detected_src_lang = {"confidence": 100.0, "language": source_lang}
-
+          detected_src_lang = {"confidence": 0.0, "language": "en"}
+        
         src_lang = next(iter([l for l in languages if l.code == detected_src_lang["language"]]), None)
 
         if src_lang is None:
@@ -679,14 +709,18 @@ def create_app(args):
                     if translator is None:
                         abort(400, description=_("%(tname)s (%(tcode)s) is not available as a target language from %(sname)s (%(scode)s)", tname=_lazy(tgt_lang.name), tcode=tgt_lang.code, sname=_lazy(src_lang.name), scode=src_lang.code))
 
-                    if text_format == "html":
-                        translated_text = unescape(str(translate_html(translator, text)))
-                        alternatives = [] # Not supported for html yet
+                    if translatable:
+                      if text_format == "html":
+                          translated_text = unescape(str(translate_html(translator, text)))
+                          alternatives = [] # Not supported for html yet
+                      else:
+                          hypotheses = translator.hypotheses(text, num_alternatives + 1)
+                          translated_text = unescape(improve_translation_formatting(text, hypotheses[0].value))
+                          alternatives = filter_unique([unescape(improve_translation_formatting(text, hypotheses[i].value)) for i in range(1, len(hypotheses))], translated_text)
                     else:
-                        hypotheses = translator.hypotheses(text, num_alternatives + 1)
-                        translated_text = unescape(improve_translation_formatting(text, hypotheses[0].value))
-                        alternatives = filter_unique([unescape(improve_translation_formatting(text, hypotheses[i].value)) for i in range(1, len(hypotheses))], translated_text)
-
+                      translated_text = text # Cannot translate, send the original text back
+                      alternatives = []
+                    
                     batch_results.append(translated_text)
                     batch_alternatives.append(alternatives)
                 
@@ -703,14 +737,18 @@ def create_app(args):
                 if translator is None:
                     abort(400, description=_("%(tname)s (%(tcode)s) is not available as a target language from %(sname)s (%(scode)s)", tname=_lazy(tgt_lang.name), tcode=tgt_lang.code, sname=_lazy(src_lang.name), scode=src_lang.code))
 
-                if text_format == "html":
-                    translated_text = unescape(str(translate_html(translator, q)))
-                    alternatives = [] # Not supported for html yet
+                if translatable:
+                  if text_format == "html":
+                      translated_text = unescape(str(translate_html(translator, q)))
+                      alternatives = [] # Not supported for html yet
+                  else:
+                      hypotheses = translator.hypotheses(q, num_alternatives + 1)
+                      translated_text = unescape(improve_translation_formatting(q, hypotheses[0].value))
+                      alternatives = filter_unique([unescape(improve_translation_formatting(q, hypotheses[i].value)) for i in range(1, len(hypotheses))], translated_text)
                 else:
-                    hypotheses = translator.hypotheses(q, num_alternatives + 1)
-                    translated_text = unescape(improve_translation_formatting(q, hypotheses[0].value))
-                    alternatives = filter_unique([unescape(improve_translation_formatting(q, hypotheses[i].value)) for i in range(1, len(hypotheses))], translated_text)
-
+                  translated_text = q # Cannot translate, send the original text back
+                  alternatives = []
+                
                 result = {"translatedText": translated_text}
 
                 if source_lang == "auto":